Not that I'm saying that anyone here should immediately run the their Physician, but my wife has the worst time falling and staying asleep on the nights she doesn't work. (She works overnights and it's seriously messed up in the normal sleep department.) She takes Ambien and it works well for her usually, but every now ant then, it doesn't do anything. Me, on the other hand, I can sleep almost as soon an my head hits the pillow and stay that way until the damn alarm wakes me up.
jaysin, I know you've said in the past that you have ADHD, have you tried anything to get yourself tired? I feel that those that suffer from ADD & ADHD fall into two camps, those who are always "on", like you, and those who are "off". I used to work with a guy who had really bad ADHD and he said that if he slept for 4 hours a night it was a good night. Four hours in my bare minimum....
I feel for you, brother. Here's hoping you get some well-deserved sleep.
-Jason