Same problem here---- mysterious back pain! Had it for years, and have been to many drs., therapists, chiropractors, assistants, nurses, massage therapists and whomevers. The problem does not show up on the numerous and varied tests, so therefore, it does not exist except in our confused little minds. The most recent diagnoses was from a 5'2'', 90 lb P.A. who told me I need to exercise, and diet. When I can hardly walk or stand, running a marathon is not in my future!
Teaching hospitals are not the answer, they are interested in teaching their budding little docs, patients are secondary. The one I went to was a literal and proverbial snake pit.