Best advice I can give is to talk about it with your therapist, friends, family, or even just to a pet. You’re having more panic attacks because you’re constantly in fight or flight. Try going on a walk once a day, it doesn’t have to be a long one. This will help get some of that extra energy and stress out of your body. You will get through this
I have ptsd from other things but when I wake up from nightmare i started to listen to headspace sleep cast. I can't say that they work for eveyone but I've been able to get sound sleep it kinda just puts me in a different mind space and keeps going so my brain keeps processing sending different (it's kinda like a story, it's hard to explain)