I learned this through sobriety, but it really has had a postive impact with dealing with my flashbacks.
I notice that when I get HUNGRY
                                  ANGRY
                                  LONELY
                                  TIRED
I am more susceptable to flashbacks. And panic attacks. 
Recently I learned that when Im excited even about GOOD THINGS, I often cannot differentiate between early panic attack vs happy excitement. Crazy? dunno. Its been really oddly helpful to tell my brain - hey things are ok, this is good stuff! and focus on breathing, and then I DONT go spiraling. Cause, well, for me today, life IS good. and I certainly dont want to ruin another moment  in my life over 

 yanno?