I've been diagnosed with Fibromyalgia, but don't feel the diagnosis is correct

I have been suffering with chronic pain in my extremities for 10 years. (lower legs, feet, arms and legs.)My pain in legs and feet are at times unbearable. I was tested for lupus, lymes and MS among other disorders, all testing negative. I was given a diagnosis of Neuropathy. However 2 other neurologists disagreed and thought it could be MS without lesions. I've been treated with Neuropathy by Celebrex, Lyrica and Carbamanzapine (among others similar tried in the past. My pain is still chronic prohibiting me from working and enjoying regular activities. This spring I went to Mayo Clinic in Arizona. With all my records they were certain it was in fact Neuropathy. After 4 days of various testing the neurologist was surprised to conclude it was not Neuropathy. He stated he could not give me an answer for my condition. Advised me to continue with meds a currently prescribed. I asked during my stay IF this could be Fibromy. and he said no. My neurologist at home had given me the same response years prior. However, upon a followup with my hometown neurologist to review the Mayo reports he referred me to a R.A. doctor. When I went to the appt. with RA Dr. she did not receive my files/records by some clerical error and just visited with me the 15 min. allowed and I gave her quickly my history. She just told me, "you have Fibromyalgia and we can prescribe you Cymbalta. I am baffeled. Being told by various Drs. "you do, you don't, you do"!! FIRST QUESTION, I've been on Lyrica for approximately 4+ years. Lyrica is in fact a RX used for Fibromyalgia. Hence, I would think that the Lyrica would have improved my pain. I don't want to add more medication to my collection (Cymbalta) by a Dr. telling me I have Fibrom. without reviewing my files. SECOND QUESTION, is there some test that will positively diagnose Fibromyalgia? If so, what is that test? I need a resolution to my chronic pain, it's unbearable! I'm 43, and hate to know what I will deal with when I'm in my senior years