PTSD and quitting

Has anyone had to manage ptsd flashbacks during quitting? How do you do it? I've been stuck in an emotional flashback for days, I'm only now starting to relax a little but I'm still feeling that residual terrified feeling. I would usually smoke weed to force myself to calm down, but that's obviously not an option anymore.

I'm on meds for anxiety but they really don't work, but it's my only option since they put me on lithium and I don't want benzos.