After 10yrs of living with PTSD & the resulting phobias, depression, nightmares, flashbacks ect, I eventually had CBT (on the NHS) I had previously had other talking therapies and am still on antidepressants.
But CBT did for me what nothing else had, it helped me face my worst nightmares, basically what you did Chernarus but in a controlled manner and under the supervision of a trained therapist.
So if you haven't tried CBT for your PTSD, I'd say its worth checking it out.