Has anybody had any luck with fibromyalgia treatments without going broke in the process?

I've had fibromyalgia since 1991 and have been treated with P.T., medications (tramadol, elavil,clonopin, & lorab), stretching, massage therapy (when I can afford it), and some biofeedback. My neck and back are so tied in knots it feels like concrete. My current regiman barely gets me by. I have worked steadily since diagnosed, and done some pretty physical type jobs. I do believe staying active is much better than laying around feeling sorry for myself. It helps me take my mind off of the pain if I keep busy. I couldn't afford to live on disability even if I wanted to, lol.
I have tried tens units, and water aerobics/therepy without any relief.

I am curious about yoga being a possible help to me.