It may not technically be PTSD but you can definitely have trauma from psychosis. When I had a psychotic paranoid break I was messed up from it for awhile. I went to visit the medical doctor and had a panic attack bc the outside looked like an ambulance bay and the last time I was in an ambulance (at that point) I was sure the attendants were going to kill me. It wasn't fun. As with any trauma the only thing Ive found that helps is talking or writing about it so you can get it out of yourself.