Unfortunately there are no tests for fibro. This is diagnosed as a catchall when normally all testing comes back negative and patient has been in pain over a certain length of time with multiple trigger points, etc. (TT)
TT has the 411. It's true that there is no definitive test for fibro. Usually it's a matter of eliminating all the other possibilities. But if you find a doc who will check you based on the ARA standards and finds you have all the tenderpoints it might help.