Yea I have problems going to sleep. I got to bed around 2:30 and lay there and toss and turn and can't fall asleep.
I only have problems sleeping when I stay up stupidly late and only go to bed at 4am, it's impossible sleeping when it's starting to get light and the birds are twirping. I don't stay up that late any more, I try not to stay up later than 3am.
I don't have problems sleeping at all though, even if I have an exam the next day or whatever that I'm really stressed over, I'm just like 'DEAL WITH IT TOMORROW ZZZZZZZZZZ'