Sean,
I've been struggling with a persistent condition of chronic pain for about three months now. A few doctors have abandoned me and I'm now in the care of a homeopathic physician. I've made numerous dietary changes and about to dive into the "Eat for your Type" diet which is all about eating based on your blood type. http://www.dadamo.com/ I've heard wonderful stories of recovery with people who have done this. Don't know if it might help you but probably can't hurt.