Traveler, I'm going to send you some info, books and names, of those who have helped me. I found out from a counselor a few years ago that a lot of the problem in her opinion based on much of the research she has done (she went to Standford and Guelph here in Canada) is rooted in left brain/right brain interaction. It sounds crazy, but just while recounting some of my demons, she would tap my right knee/left knee depending on certain things, and went from there with many techniques to help store and remove things from the left/right side of the mind as it is needed. It really, really works, far better than anything else or any medications they can give you for PTSD and sleeplessness because of it and other issues.
Many other vets are being treated with similar techniques. Marcus Luttrel of Lone Survivor fame is one of them. At one point after being retired by the Navy on a disability pension, he thought he was losing his mind. He rarely slept he's said, and even during daylight hours, people would find him out in public, with his hands pressed to his ears and eyes closed, crumpled against a wall, as he could hear the screams for help from his friends constantly. His story and many others are very similar, as is yours, but there is hope in some of these newer counseling techniques. My counselor is a christian woman in her 50's, and is a very "robust" type of person who isn't into "bs" ish type of nonsense, so please don't think this stuff I'm talking about is some new age crap, it is very, very effective.
Anyhow, I read some of your previous posts regarding losing your wife last year, I can only imagine how awful losing a close loved one can be, but the most important thing to know is you aren't alone in your struggle, even people here reading your posts are with you in mind and spirit, and will offer you support in any way they can.
All the best, and know that you're in our thoughts and prayers here.