It is difficult to know exactly what your problem is as you haven't described it in detail, but if you are looking for someone who could help you with neural tension you would be better off with a physio, as it is generally not included in medical training as far as I know. Otherwise, ask if someone is familiar at least with the work of David Butler or Michael Shacklock, who are the experts.
On the other hand, it sounds like you might possibly have something closer to fibromyalgia if it is general aches everywhere, and you may be better off seeing a rheumatologist. You have seen an enormous amount of doctors, though, and it seems unlikely to me that anyone will be able to give you a definitive diagnosis as I assume all important testing has been done.
I don't mean for you to take this the wrong way, but from the brief history you have mentioned, it sounds either like something extremely rare and difficult to diagnose, or perhaps there isn't an easy diagnosis. Often these kind of pains can be impacted by outside things, like relationships, stress, anxiety, activity levels, etc, etc, etc. That doesn't make the pain any less real, it just means perhaps you need someone who can think quite holistically about your problem, and there is almost definitely not an easy solution such as a specific diagnosis that can be 'cured'.
I would like to stress that I am not trying to offend you in any way, and I don't know all your history, but I work with patients with very chronic pain and it is a very complicated (and real) thing, and there is no easy solution. I'm sorry because that is probably not what you want to hear.