I can't sleep. Help please!?

I was diagnosed with major depression and I knew I was going to have trouble, but not this bad. It's six am and I still haven't slept. I have to go to school in an hour! I don't get this - yesterday I fell asleep at 11 and woke up at 3p, the day before I fell asleep at 3 and woke up at 10, and before that I only slept for about 5 hrs. I want to just stay in bed and sleep everything off... But I can't, and it sucks. Nothing is working ;( my life is really suckish right now. (understanding that's an understatement) ... Help? Is this normal? Do you have anything similar?