Hi, just wanted to say welcome, I have no personal experience with that, my old room mate had that same disorder, though she had no insurance and no money to pay for treatment. She had pain over her whole back and wrapping around her abdomen. More then once she actually blacked out from the pain. I just couldnt believe how severe it really was. She said it was that feeling of touching a hot skillet, only leaving your hand on it.
I think you'll enjoy this forum, I've only been here a couple weeks and everyone is very understanding and supportive, just a big family I think. I hope that your procedure gives you some relief, good luck and God bless.