Blimey...your tale of woe shares common ground with mine...I also have tried every treatment under the sun without joy including spinal injections et al. It is soul destroying and expensive. The complaint has cost me a very well paid job and my sanity so can understand your army frustration, you truly have my sympathy for what it is worth.
Ironically the most progress that I have made is by stopping all treatments, resting, reduced alcohol intake dramtically and walking 3 miles for exercise everyday. Dare I say it but I have have had symptom free days in recent weeks. In two weeks I have got further than all four and a bit months of physios, osteopath (although he was the best), doctors, bowen therapy, specialists etc...
I am also going to ask for blood tests as I have met a number of people who have had similar problems and only after having blood tests have they found the true answer.
Martin