INSOMNIAC- (someone) who habitually cannot sleep

That's what i am.
I face difficulties to sleep.
I lay on the bed, almost every night, trying very hard to sleep, but i just can't although my eyes are already heavy.
And when you eventually fell asleep like six in the morning or even later, you'll tend to sleep longer!
At least TEN hours of sleep, and by the time i wake up it's already late in the afternoon and soon it's going to be night time.
I can't go out by then and i will end up rotting infront of the computer.
A very unhealthy lifestyle, i know.

You know what now?
I am worried that i can't get in time for school which will be re-opening in one weeks' time!
Exams just gets nearer when school re-opens! , STUDY not sleep.

Suggestions, anyone?
Not sleeping pills, please.