Sharon, I have never had this done. I'm so sorry you are having this type of reaction. You had enough pain to begin with! I know we do get desperate to try things to help us. Hopefully this will turn around for you and be helpful.
The only thing I can suggest is stretching those muscles and using moist heat. I wish I could offer more help but I really don't know much about epidurals for fibro. I believe it is a steroid that they inject you with so I'm surprised you are having the reaction. Let us know how you are doing.