Some ideas:
Do something practical rather than thinking it out – thinking is an overrated human skill -amazing skill but can lead to all kinds of misconceptions (remember, using basic logic, things are NEVER what you think they are! – eg can you drink the thought “water?”)
Try Phil Parker’s Lightning Process to break the pattern of associations
Check out the work of Peter Levine and David Berluci for PTSD release from the body-mind
Find a good body therapist rather than a “thinky” therapist
Read Anita Moorjani’s book to get some perspective!
Hope that helps