I get trouble sleeping? URGENT? school soon?....?

when I go at bed at around 9pm I stay awake for quite a while. the past two nights vie done an all nighter. I know I shouldn't but the truth is, I'm terrified of going to sleep. I have a soundproof room, I don't keep my iPod or phone in the room with me so I have no distractions. and my room is always pitch black at night. but what happens is, as soon as I close my eyes, I sort of get pop ups of scary faces like the exorcist (which my friend tricked me into playing about a year ago) and I used to get bad nightmares. my mind plays tricks on me aswell like one little noise from outside my door my heart races and I think I see the doorhandle moving slowly. also when I'm on my iPod or computer from 5-8pm I'm scared a pop up will pop up XD I have school next week and I really need my sleep. its seriously affecting me. thanks