I've got something similar going on right now also. I'm sorry you are struggling with this...
I've found sitting through it (as Red75 mentioned) leads to some more cognitive "memories" (not just physical sensations) coming up... but I struggle to figure out if they are real or not.
The thing my T's have mentioned lately though, is to deal more with the emotions it all brings up, and not focus so heavily on figuring out if it's real or not. Since memories can be inaccurate, unless there's someone to corroborate the memoriy or evidence somewhere that it is true, it may just be our way of making sense of things we don't necessarily understand... It's really difficult to do though (I really want to know if mine are true, but there's no one to ask).
I hope you can find some peace with it all.
<3