Memory is a constructive process. Chinese whispers is a constructive remembering process, too. A person hears a word (or just kind of hears it on the tip of their tongue so they aren't quite sure). Then it gets filtered through their hopes and fears, beliefs and desires etc and what comes out of their mouth for the next person is a slightly morphed version more often than not.

Sometimes people have this notion of memory where the mind is like this blank piece of paper and experiences are captured with a photographic quality and these photographs reside in the mind unchanging. Then a therapist comes along and bingo! That picture (that one couldn't access before) emerges before ones mind and there it is: The TRUTH.

But memory doesn't work like that.

Any good therapist will know this. There is much that has been written on the appropriate theraputic attitude where the appropriate theraputic attitude is to be agnostic as to the truth or falsity of memory claims with respect to how much they capture external events. Therapy isn't supposed to be about getting at the truth of what happened in the external world, at any rate, those facts aren't accessible to therapists. What they deal in is how your rememberings affect you.

Uncertainty is hard... But certainty can be more damaging (especially when corroboration or disconfirmation from the world is unavailable to us). Learning to live with the uncertainty... A good therapist should be able to help you do that...