Is it insomnia if it's just for one night?

At any rate, I CAN'T FALL ASLEEP!! argh. I have to be up in 4 hours. And I have two assignments due. 1 of which I haven't started yet.

argh. argh.

Okay, I'm going to turn out the lights yet again, and I'm NOT getting out of bed again until the alarm goes off. . . even if I have to lay here and stare at the minutes ticking off the clock.