The mainstream research is not very supportive of diet as a means of treating PTSD. But here is some research that a hypoglycemic diet may be beneficial for PTSD. See:
http://www.hypoglycemia.asn.au/articles/PTStress.html In my research I have found only positive things and no negatives, so it would seem to make sense to give it a try as long as all your other blood chemistry is being monitored.
A similar situation is to be found with the use of EMDR, mainstream research does not support it, but there are some indications that it helps. If I were to be in the position of having PTSD and the devastating symptoms that are associated with it, then candidly, I would first try conventional means like psychotherapy and medication and if the results were not satisfactory, I would try anything that was not harmful to obtain alleviation.
I hope this information has been helpful and wish you the best and what better preoccupation is there than to try and find relief for this devastating illness.
If you require further clarification or more information, feel free to ask!
As I said I absolutely agree withn you. The one addition that I might make is to try cognitive behavioral therapy. In CBT you learn new ways of thnking and acting and as a result your feelings improve. It is evideced based effective on anxiety disorders.