Mental Images

Can someone please make the pictures in my head go away?? Tonight when i was watching tv it showed a girl who had slit her wrists, and now i cant get that image out of my head. I am dead tired, but i am scared to go to sleep, coz i know that if i do atm, then i will have heaps bad nightmares, worse than normal.
I dont know what i want you to do, just make them go away. I cant keep going like this. I know i probably sound like i am over dramatising all of this, but this is honestly how i feel now.
I have tried to think of other things, but everytime i think of something, the thought turns morbid. Zarna said not to think of purple elephants, which automatically made me think of them, but the purple elephants in my head where sometimes harpooned, other times they were shot, and other times they had their wrists cut.
Everything around me tonight seems to be totally morbid, but then again, when i am in this sort of mood, i seem to have the ability to see anything and everything as morbid, so i dont know.