How do I know if a memory is false or not? I keep going back and forth between “yeah that definitely didn’t happen.” To “what if it did?”.

im going to be vague here, but basically i did something in the past that i regret and it became a huge point of my OCD but i have talked to my therapist and i have mostly moved past it. i watched a video by an OCD youtuber that really put it into perspective. anyway, i have been with minimal worry for a few days, but now im having worries related to i think false memory? basically it’s like “oh but what if i said/ did this and just forgot that means i harmed this person im a bad person”. to me it sounds like textbook OCD but im just wondering if anyone else has experienced false memory / real event at the same time. i have a really horrible memory which is making it even more stressful. any responses are appreciated!

Does anyone else’s false memory intrusive thoughts of what could have happened feel very, very real?

This situation just happened and I can definitely remember how it went but my brain is telling me otherwise and I know you guys said to sit with the uncertainty but what if the intrusive thought is so bad like disgusting, I can’t sit with that. Maybe it’s false memory but this just happened. I don’t even know how to live with this