How to stop being afraid of

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?

How do u stop worrying about if ur going to prison if u tell ur therapist about ur ocd or real event ocd ive told a therapist before about it but i dont know if how im feeling is rational like what i keep imagining her judging me finding me weird then calling the police and the police saying infront of everyone what happened and then me being locked up for the rest of my life .?????

UPDATE: ive reduced my posts to once per day in hopes of trying to overcome this... but right now... i genuinely feel so horrible and anxious that i need to post... (For context, in the past, I have been catfished by a man pretending to be a woman, had a minor on a dating app who lied about her age and i unknowingly flirted with her because I assumed she was 18+ and her bio said so, and sent a n00d to a "woman" online who now I suspect of being a catfish... this is the reason why I'm so scared of whether or not I unknowingly explicitly chatted wjth a minor... i know that this is all my fault, but still...) Its making me feel like I cant remember things properly... making me think i unknowingly explicitly chatted with a minor online or being catfished by a man or kid... making me question every woman Ive ever been flirted with or explicitly chatted with... intrusive thoughts of me "explicitly cybering with a minor or a man" and of me going to jail because my worst fear of "unknowingly cybering with a minor(s), or being catfished by one" coming true... im genuinely depressed... and I feel so alone... uncertainty has brought me nothing but hell... and theres no getting out... it feels like im waiting every day for my intrusive thoughts and fears to be proven right, and ending up with me going to jail... I have never felt more alone... I just keep getting intrusive thoughts that one day, when I become famous or get my dream job, im going to get a future moment of any girl I explicitly cybered with in the past, saying... "Hey, I was a minor when we cybered and while you didnt know, im going to get you arrested or cancelled." Or that im gonna get catfished by a dude pretending to be a woman online... Im genuinely scared of the future... and this is honestly why I dont want to be famous or an influencer... Because not only do i fear someone will "expose" me for my POCD and my Real Events OCD, but im also scared about this entire situation...