I know how tricky this is, i went down this exact road, a false memory added to a real event that IF true, meant I had done something very wrong and betrayed someone I loved. I eventually came to realize that, if I didn't matter at the time, it actually doesn't matter now, and that my problem wasn't with uncertainty, its with OCD. the extreme feeling of distress, the constant twisting of the timeline and adding of "new" details, I had to take a step backwards and just really see the whole thing as an OCD lie. And in accepting uncertainty, you MUST shift your view away from the normal OCD attitude of " if there is a possibility, then that means I did it" over to " just because its possible doesn't mean its probable" to me, its a 1 in 1 million chance my memory is real, and that's SO ASTRONIMICALLY small that logical says I just shouldn't even waste my time trying to figure it out. Thats why people with hit and run OCD have to learn to discard the " what if I ran over someone and cant remember" its not that they are admitting they probably hit someone, its admitting that certainty actually doesn't exist in ANY situation.. yes, read that again, CERTAINTY DOES NOT EXIST. And iv tried to find the exception to this and cant... i told my therapist " I'm certain I'm sitting in this chair in the room with you" she said " are you? are you sure this isn't the matrix?" and as foolish as that sounds, shes right lol, NOTHING has certainty, but we don't question things that have the 1 in 1 million or 1 in 100,000 odds. You have to tell yourself sure its POSSIBLE, as EVERYTHING is possible, but its just not probable and therefor not worth your time, and move on.
