What’s can help with intrusive mental images?

I have had the same false memory/instrusive image of me doing something horrible to someone when I was 12 and they were younger. It is a memory based on a real event. I truly don’t know if it’s real or not but obviously, the more I think about it the more I think it’s true. This has led my mind to become slightly paranoid. I worry that if this horrible image in my head is true then one day the person I might have hurt will come and k*ll me. I’m really scared I feel like I won’t feel better as long as this “memory” is in my head. Does anyone have advice?

I’ve recently been having the spiraling intrusive thoughts coming up out of seemingly nowhere. Well not exactly nowhere, having some relationship issues but the thoughts will just randomly show up when I’m clam home reading a book.

are they truly intrusive thoughts or am i thinking and creating automatically graphic images that i dont want to think? i think it happens because it's too easy once you're anxious abt it. i dont enjoy it. i just saw a trigger and had a graphic disturbing se&ual image in my head.