Hi The Lev,
My heart goes out to you. I can fully relate to trying to decide whether to exercise or not, whether to see yet another specialist and repeat well worn symptoms yet again or just whether to in your case clean out a drawer (wouldn't cheer me up.) I'm in a similar boat right now with my hips and elbows currently plagueing me, tried a walk to the post box and back about 1/2 an hours worth and now sitting here wondering why I bothered!!! Have to go back to work in two weeks and am seriously worried how I'll manage or whether the miraculous happens and the flare dissapates. I think this site raises my spirits, lot of people out there suffering. Hope you find a solution to the muscle/tendon pain, don't ignore it, I'm positive if there's pain you need to find some sort of cause or explanation that you're happy with. But in the meantime keep tidying those drawers.