Somebody please help me, I can't take this anymore.

I have a mad sleeping problem. I can't sleep at all as hard as I try at any time. I've been forced to stay up till 5 AM nearly every damn day, and then I fall asleep for maybe an hour. And then on others days when I fall asleep at that time, I will wake up at 4 or 5 PM. My sleeping schedule is fucked up to hell, and I really need some help to fix this before school starts. If anyone has got any tips that don't have anything to do with drugs or stuff like that, it would help a lot. Thanks.