i find that a request in writing for assistance with pain management or referral to a specialist/clinic works wonders with overwhelmed/uncaring docs. it always looks to them like the first step in a law-suit, and they are hasty to send you away with something to show for it.
i do know what you mean,,, some people just don't 'look like' they are suffering ... :O some get help at much lower levels of pain and impairment, and it's just one of those inexplicable things in life. i had an uncle with back pain who was always being called 'lazy' , because everyone else just worked with pain, somehow were able to tolerate it. i have a very high pain tolerance myself, but am developing the painful kind of neuropathy. i don't look forward to the meds they will try to give me for that~! some of them have a very high incidence of crippling side effects or even death~ :O
you might try the 'binaural beat' audio technology to increase your ability to tolerate the pain. (be sure to use stereo head phones when you listen.) i wish you the very best.