I have this too. It has always taken me a long time to get to sleep because I simply can't get my mind to turn off. What's weird is that while I'm trying to get to sleep it's like I'm in some kind of a trance and if my concentration gets broken because of an exceptionally loud noise or I suddenly need to get up for something I imediately forget whatever it was I was thinking about no matter how much I want to remember. I can relate to being up all night. I've had several instances in the past couple of weeks where I'll go to bed and won't be able to fall asleep for like 7 or 8 hours.