I'm sorry for your situation... I've been there too, unfortunately. One has to make contact with the real world in all ways possible, I think, to help work through this. The "essence" of the flashback lingers longer than anyone wants them to, imo.

I think with such a strong sense of a trigger, that the best thing is just let it be...not try to delve into it anymore, or figure it out etc... seems to me you have experienced it enough for now. Don't push the envelope by digging more, it could cause more flashbacks (being too much ==overload)

I have a T to call when I get these, do you?