Same here.
It's impossible for me to sleep at night, I usually fell asleep only around 5 AM... And sometimes I keep oversleeping my lectures and it's getting really annoying. I don't want to sleep through all my days. Though I like to sleep , but I would like to be able to do that at nights, not during the days.
I tried everything. I tried listening to relaxing music while trying to fell asleep, I tried pills called "night rest" (just simple pills with valerian), tried to exercise hard during the day so that I would be exhausted when the night comes but even this didn't helped...
It got worst suring the last couple of months, though it started couple of years ago, during my last years at school... when actually most of my problems started... :S