i second what bridget says......
bridget, not sure if this would help you, but as soon as i get a triggerpoint injected, i put an ice pack on it and use ice one and off for the rest of that day, that seems to help, don't know if you've tried ice on it.
i too had a triggerpoint in the back of my head done and it too was awesome! you might think it would hurt to have it injected but it didn't really, it just felt good.....i guess there aren't a lot of nerve endings up there. anyway, my head stopped spasming, could lay it on my pillow again!
i don't have fibro, so they can definitely get activated in other ways.
i too believe in them, mostly because the things my doctors have done to treat them really work.
