You fall asleep without much trouble. Then suddenly your eyes open. You reach for the clock. 3:07 AM. The next night, it happens again. Maybe it's 2:42. Maybe 3:30. Maybe 4:00. After enough repetitions, it starts to feel strangely specific. And if you've searched online for an explanation, you've probably encountered confident answers: It's your cortisol. Your blood sugar is crashing. Your liver is waking you up. Your hormones are out of balance. The reality is less dramatic—