how do you tell the difference between false memory OCD and a repressed memory???

Hello! Sorry you are in distress! Firstly, I don't want to play into reassurance because that can make OCD worse in the long term, but I want to share something I wish I knew earlier. Apparently despite being a common part of pop culture and pop psychology, there is a lack of scientific evidence that repressed memories actually happen. You are highly unlikely if at all possible to repress a traumatic event. So in short, you can't tell the difference between false memories or repressed memories because they are both fictions of the brain. Hope that helps!