I don't know how to stop those types of flashbacks, tho I've sort of gotten used to them...(if that's even possible). For instance, the past 2 days, I expected to have a full blown anniversary reaction and what occurred is that I felt a deepening sadness that turned to sorrow... I had myself a good crying jag and was able to connect it to the past. Processed it and went along my way.
But when it comes out of the blue and there is no identifiable trigger, it is really frustrating to cope with. I also have not found CBT techniques or grounding techniques to be very useful against emotional flashbacks. The only thing I can think to even say about EFB's is that it serves to remind me that I am a survivor..(if I am in the right frame of mind this makes me feel strong, if not,.....it does the opposite and I get totally depressed and anxious about the next one).
What does help me is to id it as an EFB as soon as possible, then it is not as scary or intimidating.
Sorry, I know this post may not be particularly helpful,
but you are in good company methinks,
:):cool::inlove:
Wishing you Peace,
LH