Why You Keep Overthinking Everything (And What Your Nervous System Has To Do With It)

Have you ever wondered why your brain just... won't let something go?

Have you ever walked away from a conversation feeling completely fine, only to replay it in your head for hours? Or sent a text and immediately started wondering if it sounded weird.

Orrr… you have a first date you're genuinely excited about. Vibes were high and you were feeling hopeful. But instead of looking forward to it, you can’t help but to mentally rehearse a ton of ways it could go wrong.

If you're anything like the women I work with, overthinking isn't something you choose to do. It's something your brain just... does (more on why later). And it's exhausting especially when you're already so self-aware.

You know you're overthinking. You know it's probably not helping. You know there's a good chance none of the stories you're telling yourself are even true.

So why can't you stop?

"If I could just think about it a little longer..."

Most people treat overthinking like it's just a bad habit you just need to break, but it usually starts with a really good intention: Your brain is trying to protect you.

If it can figure out what they meant, if it can predict what might happen, if it can prepare for every possible outcome...

Maybe you won't get blindsided. Maybe you won't get hurt. Maybe you'll finally be able to relax.

The problem is it never actually works because when you’re living frrom an anxious operating system, there will always be one more “what if”…one more possibility to consider, one more conversation to replay, one more thing to analyze.

Overthinking is trying to guarantee certainty, which is pretty much impossible in this life. So it usually does the opposite of helping and just leaves us feeling even more anxious.

Your brain isn't trying to make your life harder.

It's trying to keep you safe. This is the part that changed everything for me. I started getting curious about what my overthinking brain was trying to do and how I could support it in a healthier way that actually leads to feelings of peace and presence (for me, this is the gold-standard of contentment 😌.)

Our brains don't spend hours analyzing every little thing for no reason. They do it because somewhere along the way, they learned that staying hyper-aware might prevent pain.

For some people, that looked like learning to read the room before anyone said anything.

For someone else, it meant becoming really good at predicting other people's moods.

For another person, it meant believing that if they could just think through every possible outcome, they'd finally feel safe.

None of those strategies mean there's something wrong with you, they’re just protective subconscious programs that are in need of a little upgrading. Luckily, this is 1000% possible. Your nervous system hasn’t gotten the memo that what protected you once may no longer be necessary now.

This is where sooo many high-functioning women get stuck: when your mind knows you're okay...but your nervous system is still trying to catch up.

So what does your nervous system have to do with it?

One of my favorite ways to explain this is that your mind and your nervous system don't always update at the same pace. Your logical brain might know you're safe while your nervous system is still preparing for something to go wrong. Think about someone who's afraid of flying. They’ve probably heard and know logically that flying is one of the safest ways to travel. That doesn't automatically stop their heart from racing during takeoff. Why? Because their body isn't responding to facts.

It's responding to what it was programmed to expect.

The same thing happens with anxiety. You can know your friend isn't upset with you but you get a sense that your body is preparing for rejection. You can know your boss probably just wants to ask you a question and your body still braces for criticism. You can know your partner loves you, but your mind still starts filling in the blanks because they took a little longer to text back. This just means your nervous system learned that staying alert was a the best way to protect you.

The problem is, what protected you at one point in your life is likely what’s now keeping you stuck.

The goal isn't to stop overthinking.

The goal here is not to never have another anxious thought. If it were, we'd all be chasing something impossible. The goal is that those thoughts stop running your life. That you build the capacity to notice them without automatically believing them, that you stop treating every uncomfortable feeling like an emergency, that you stop needing certainty about a situation before you’re able to relax.

One of the biggest shifts I see in therapy is when women realize they don't have to answer every question their anxiety asks.

"What if they're mad at me?" Maybe. Maybe not.

"What if I embarrassed myself?" Maybe. Maybe not.

"What if I make the wrong decision?" Maybe. Maybe not.

This isn’t something you can force, but it’s something you practice. Your nervous system doesn't become safer because you found the perfect answer to your anxious thoughts. It becomes safer because it learns you can handle not knowing and trust yourself to handle whatever comes your way.

This is why I love EMDR and Brainspotting.

One of the reasons I use EMDR and Brainspotting in my practice is because they're not just about helping you understand your patterns.

Most of the women I work with already understand a lot of their patterns. What they're missing isn't only more insight, it's a new corrective experience.

EMDR and Brainspotting help your nervous system process experiences in a way that allows it to stop expecting the same outcome. Over time, your body starts learning that uncertainty doesn't automatically mean danger, that conflict doesn't automatically mean rejection, that disappointment doesn't automatically mean there's something wrong with you.

One of the biggest, most relieving shifts you can make is when you stop trying to think your way into feeling safe. You actually start experiencing safety, and those are two very different things.

What life starts looking like instead:

This is my favorite part because it's the part no one really talks about. I’m all about trauma processing because it’s usually a necessary step to reach the ultimate goal: living your best life.

Healing usually looks a lot less dramatic than people expect. It can look like sending the text and not rereading it six times before you hit send, or simply enjoying a first date and trusting life to support you, instead of spending the drive home analyzing every sentence you said. It looks like your friend taking longer to respond and your first thought not being, "What did I do?" or making a decision without asking five different people what they think first. Healing to me looks like waking up and noticing your mind trying to race ahead, gently bringing yourself back to what's actually happening in the moment, and actually FEELING the internal shift and relief.

But most importantly, I genuinely believe healing means having more room for your actual life. More room for joy, connection, rest. More room to be present with the people you love because your energy isn't constantly being spent preparing for things that may never even happen.

THAT is my hope and goal for you :)

If this sounds like you…

If you're a high-functioning woman who feels like she's constantly living in her head or is confused as to why she’s still struggling to enjoy life to the fullest, I want you to know there isn't something wrong with you. You're not too much, you're not "just an overthinker," and you don't have to spend the rest of your life trying to outthink your anxiety.

I believe real change happens when your nervous system finally starts experiencing what your mind has known for years.

Again, that’s why I loveeeeee EMDR and Brainspotting :)

If you're looking for a therapist in Colorado or California who specializes in helping high-functioning women with anxiety, overthinking, perfectionism, and relationship patterns, I'd love to connect.

You can schedule a free 15-minute consultation here. We'll talk about what's been feeling hard, what you're hoping will feel different, and whether we're a good fit :)

Written by Lauren Cortez, LMFT

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Why Do I Still Feel Stuck After Years of Therapy? Understanding the Missing Piece