EMQ Chick,
I can't help you on the fibro, but am familiar with back pain. I don't know if this would be helpful or just cause more problems because of the fibro. Have you heard of peripheral nerve stimulators? They are generally for the back, but I have one for my migraines.

If you haven't heard of them, here is what they are. A small battey is implanted under the skin with single or multple leads coming off it. The leads are placed close to the nerves that are painful. A hand held unit lets you program the leads to emitt very low voltage electricity. You control the level of stimulation that is comfortable, and generally a technician puts several programs into the hand held remote control so you can choose where you want the stimulation to what ever area hurts. It dosen't feel like an electric shock, more like pressure. For instance, there might be a place in your back that you push on for temporary relief. The stimulator would put the same sort of pressure on that area.

Alone, mine, which has leads surrounding my right eye, cannot control my migraines, but in conjunction with my medications, it often takes the pain away longer than meds alone. It is an outpatient procedure. I don't know if it would trigger a flare with fibro, but its worth looking into.

Sam