I’m 15 and i just watched people being tortured and executed on bestgore.com. How do i get the images out of my head?

i can’t think about anything else and everything has suddenly become very bleak and insignificant. how do i end this?
Update: its been a few hours and they're gone for now. haven't slept yet. i'm still disgusted.. but slightly over it. i remember going on that site when i was like 8 but i hadn't remembered anything so i might forget about it all together soon.
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