Does anyone get images of past bad things that have happened ?? Why is this so real and controlling me ?

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?

With real event OCD, I don’t know if any of you feel this way, but do you ever feel that the past event(s) that you ruminate about or constantly obsess about are gonna come up in your future and just absolutely ruin you, that’s how I’ve been feeling for months, it just feels like impending doom, and I hate having to even think that my future would be ruined by what I did as a teenager, and I did some dumb things, that I regret so deeply, I just can’t stop thinking about that.

Just bombarded with the guilt of past mistakes. Not knowing the outcome of things makes it worse. Seeing things/signs that are associated with the real event I obsess about everyday. I see it in tv, you tube, songs and everything. It's so scary how it's everywhere