Afternoon @Fluttershy1 , I'm really sorry to hear that you're struggling so much with your symptoms at the moment. And having to hide it certainly makes things even harder. Have you been able to identify if there's anything in your environment or that's happening in your life that is triggering you at present? 

SANE actually has a blog post about coping with flashbacks, which you can read about here. Some suggestions include grounding and progressive muscle relaxation. It's also helpful to remind yourself that you are no longer in that situation - you are in your safe space, in the present moment. I hope you've been able to bury yourself in a pile of fuzzy friends or warm blankets!