Hey there! You'll need to seek out a rheumatologist, all they did for me personally was a blood test to see if anything else was going on and I was diagnosed through a trigger point test. Best of luck to you, I hope you get answers soon! X

Fibromyalgia has no definitive test to diagnose. Drs will rule out other things like arthritis, MS, Lupus, depression, EDS, and some other things. Neurologists and rheumatologists will usually work together to rule out other dx's. Many different blood tests, MRI's, possibly spinal tap ( if you do end up with a spinal tap absolutely make sure the neurologist doing it can and will perform a blood patch epidural if(when) you develop a spinal headache after)

they have actually begun developing a test for fibro! I haven’t done it, but my mom did. https://www.fmtest.com

I had a blood test, they basically need to rule everything else out. It's a sort of "We have nothing left, so you have fibro." No one really knows the cause. All process of elimination