My real event changed and I don't know if it any better

I used to have this real event ocd like for 11 months. It was hell and I never thought I would recover from it. Changing event has never crossed my mind until last month. My old event was about my sexual experiment when I was a child probably around 7. That was all in my head all day until last month. I made a mistake, a sexual one. I promised myself I would never messed up again but I did. It took me about a month to look back and obsessed on it. I hate it 😭. I am old enough to know better 😢. The things is even tho I feel really bad about what I did, the real fear is not remembering all of it. Like in my head I am thinking was it all? Did I forget something important and crazy thoughts started to rushed in. The thing is I am not that scared of what I did I am scared of the uncertainty and the what ifs. Do I have false memory ocd? Sorry for venting. I don't have anyone to vent to. BTW I am 18.