Wired but Tired at Night? Here Are 10 Things You Should Know About Your Nervous System

It’s 11:30 PM.

You’ve had a day that would make a project manager weep. You’ve navigated back-to-back meetings, managed the household admin, supported everyone else, and finally: finally: the house is quiet.

Your body feels like lead. You are bone-deep exhausted.

But as soon as your head hits the pillow, it happens. Your brain clicks into high gear. You’re suddenly ruminating on a comment someone made at lunch, or you’re mentally drafting an email, or you’re just… awake.

You feel "wired but tired."

If you’re nodding along, I want you to take a deep breath.

You’re not failing at "relaxing." You don’t have a lack of willpower. And you definitely aren't "going crazy."

What you’re experiencing is a very real, very physical response to the way your hormones and your nervous system are interacting during perimenopause.

You’ve always been capable. You’re used to being the one who holds everything together. But right now, your body feels unpredictable.

Here are 10 things you need to know about why your nervous system is stuck in overdrive and how we can start to turn the dial back down.

1. It’s not just "stress": it's physiological

We often blame our busy lives for our inability to sleep. While a full schedule doesn't help, what’s happening in your 40s and 50s is deeper than just having a lot on your plate.

In perimenopause, your "stress thermostat" becomes more sensitive. Things that you used to handle with ease now trigger a full-body alert. It’s not that you can’t "cope" anymore; it’s that your internal wiring has changed. Your nervous system is reacting to hormonal shifts as much as it is to your to-do list.

2. Cortisol and Progesterone are out of sync

Think of Cortisol as your "go" hormone and Progesterone as your "slow" hormone.

Ideally, they dance together beautifully. But as we head into perimenopause, Progesterone: our natural anti-anxiety agent: tends to drop first and fastest.

Without enough Progesterone to buffer the effects of Cortisol, your body stays in a state of high alert. It’s like trying to drive a car with a stuck accelerator and no brakes.

3. That 10 PM "second wind" is an artificial spike

Do you find yourself suddenly getting a burst of energy just as you should be winding down? Maybe you start cleaning the kitchen or decide it’s the perfect time to reorganise your wardrobe.

This isn't "bonus energy." It’s an inappropriate cortisol spike.

When you’re pushed to the limit all day, your body tries to "help" you keep going by releasing a fresh hit of stress hormones in the evening. This creates that "wired" feeling that makes falling asleep feel impossible.

4. Your nervous system is stuck in "Fight or Flight"

Your nervous system has two main modes: Sympathetic (Fight or Flight) and Parasympathetic (Rest and Digest).

For the high-achieving woman, the "Fight or Flight" switch is often stuck in the "on" position. Even when you’re physically still, your body believes there is an ongoing threat it needs to manage.

Because your system is constantly activated, it never gets the chance to drop into the deep, restorative "Rest and Digest" state where actual healing happens.

5. Your brain relies on Progesterone to feel calm

There is a specific neurotransmitter in your brain called GABA. It’s your brain’s natural Valium. It tells your racing thoughts to quieten down and helps you feel safe.

Progesterone is a huge fan of GABA; it actually helps it work more effectively. As your Progesterone levels fluctuate and decline, your brain loses its natural ability to self-soothe. This is why you might feel uncharacteristically anxious or find yourself "catastrophising" at 2 AM.

6. "Powering through" the day fuels the fire at night

You’ve always been capable, right? Your superpower has probably been your ability to "power through" regardless of how you feel.

But in midlife, powering through comes at a high metabolic cost.

Every time you push through a mid-afternoon crash with another coffee or sheer grit, you are demanding more cortisol from your system. By the time evening rolls around, your nervous system is so over-stimulated from "surviving" the day that it doesn't know how to switch off.

7. 3 AM wake-ups are often a blood sugar SOS

Do you wake up between 2 AM and 4 AM, often with a racing heart or a feeling of dread?

This is a classic "wired but tired" symptom. Often, it’s caused by a drop in blood sugar. When your blood sugar dips too low in the night, your body sees it as an emergency. It releases cortisol to trigger the release of stored sugar: effectively sounding a biological alarm that jolts you wide awake.

You’re not waking up because you’re "worried"; you’re worried because the cortisol jolt has put your brain on high alert.

8. Your high-achiever traits are currently "stressors"

This is a tough one to hear, but your drive, your perfectionism, and your need to be "on" for everyone else are currently being interpreted by your nervous system as constant stress.

Your body doesn't know the difference between a looming work deadline and a physical predator. If you are constantly scanning for problems to solve, your nervous system remains hyper-vigilant. Learning to feel "safe" in your own body is a vital part of the recovery process.

A relatable woman in her late 40s in a cozy, neutral-toned bedroom, looking thoughtfully at a book or resting in soft evening light.

9. Light and screens are chemical blockers

We know we shouldn't be on our phones, but here’s why: Blue light from screens directly suppresses melatonin, the hormone that tells your body it’s time to sleep.

When you’re already "wired but tired," your melatonin production is likely already struggling. Adding screen time at 10 PM is like telling your brain the sun is still up, further confusing an already stressed-out nervous system.

10. You can retrain your system to find "Rest and Digest"

The most important thing I want you to know is this: This state isn't permanent.

You can retrain your nervous system. You can teach your body that it is safe to rest. This isn't about "trying harder" or finding more willpower. It’s about using specific, physiological tools to calm the alarm bells.

How to start feeling steady again

When I work with women in my Hormone REFRESH Method™, we don't start with intense exercise or restrictive diets. That would only add more stress to an already overloaded system.

Instead, we focus heavily on the Rest and Stress pillars.

We look at:

• Cortisol Rhythm: Supporting your body so you get energy in the morning and calm in the evening.

• Blood Sugar Stability: Eating in a way that prevents those 3 AM "alarm clock" wake-ups, leading to clearer thinking at work.

• Nervous System Regulation: Practical tools to move you from "Fight or Flight" into "Rest and Digest" so you can finally experience steady energy through the day.

You don’t have to keep running on empty. You’ve spent years taking care of everything and everyone else: it’s time to address the root cause of why your body feels so "switched on."

Imagine waking up feeling actually refreshed, having no more 3 PM crashes, and finally sleeping through to 6 AM. It is possible.

Ready to stop feeling "wired but tired" and start feeling like yourself again?

Let’s look at what’s really going on with your hormones and your nervous system.

Click here to book a consultation and let's get you a plan.