Well you're not alone, that's for sure. Are you in therapy? I suffer from PTSD as well, from my abusive childhood and from my marriage to an A. If you can afford therapy, it's well worth it to find a therapist that specializes in PTSD.
However, I regularly cannot afford therapy, so I turn to the internet and books to help me. The simple act of educating myself about this disorder has been very helpful.
Intrusive thoughts is one characteristic of PTSD, and just knowing that has helped me. Early on, when the re-living of trauma was frequent and re-traumatized me, just being able to name it in the midst of it gave me a bit of control. I would say, "this is just intrusive thoughts."
It truly is like being re-tortured though.