The only way to really know (and even then it isn't a certainty, because it really depends on the "lens" of the diagnostician) is to get a full diagnostic evaluation from a professional. That may be the only way you can get answers, given that you saw your previous therapist so long ago and your current therapist isn't trained enough to be of diagnostic help to you.

From all you have written over the last few weeks I would be very dubious of any diagnosis of a dissociative disorder. One "we" in the night doesn't really indicate one.