You wake at 3am with your heart already going. Anxious about nothing nameable. Wired but tired — body shattered, brain refusing to quiet.
None of this is in your head. All of it is biochemistry.
Why do I wake up at 3am anxious?
3am wake-ups with a racing heart are usually a blood-sugar dip triggering a cortisol spike — not anxiety in the psychiatric sense. As blood sugar drops overnight, cortisol rises to release stored glucose, and that surge wakes you. A small protein-and-fat snack before bed, capping evening alcohol, and addressing the daytime cortisol pattern typically resolves it inside two to three weeks.
What is "wired but tired" actually?
It's HPA-axis dysregulation — cortisol high when it should be low (evening), low when it should be high (morning). The body is exhausted but the nervous system can't downshift. A four-point cortisol curve confirms the pattern, and targeted nutrient + sleep + stress interventions typically restore it inside 8–12 weeks.