Get a sleep study. I was like you, turns out there's reasons why people can't sleep and one of the most common is apnea. It's not just old, fat guys who have it. Not saying you do, but it's so easy to check that reason off the list.

are you me? I fall asleep just fine, but after around 5 hours I wake up. If I don't have to face the day, I can fall back asleep some 3+ hours later - but the opportunity is seldom. I'm tired. I've cut caffeine, sugar, I go to bed at the same time every night, exercise, eat pretty well, etc. Usually around 3am, *pop*, brain is now fully active; dry, tired eyes be damned. Had a take home medical watch as a light-weight sleep study. It showed enough issues to get prescription sleep aids. I don't like using them.

Why? Too busy or not falling asleep?