PSTD symptoms??

I admit every once and awhile I have flashbacks but this past week I have hit a all time low I have been having them more and more and I'm not even sure why! I've been reading up on PSTD which is common for people with NPD abuse but he broke up with me in December. Could all these flashbacks be apart of the PSTD?? I am not trying to diagnose myself but I do have alot of flashbacks here and there and avoid certain places and the other day I got nervous all of a sudden thinking he would pop up somewhere this is crazy! Why now?? Did something happen at this time last year and perhaps my brain is remembering it or something and that's why I'm getting PSTD symptoms?