You are definitely not alone with this. I too have severe PTSD & recently had to leave my work as I was not able to function properly & was getting triggered every day. I couldn't even go into the staff room for meetings as I was overwhelmed. I too isolate myself as it's the only time I feel safe. I've had some EMDR which helped a lot & ive been referred to have some more as I responded to it so well, but I'm on a waiting list!! I also know that the PTSD will never be completely 'cured' but I am working hard on strategies to cope as best as I can.