what happened to me was I was originally diagnosed with PMR and things changed over the years. I really don’t know if there’s a specific blood test that diagnoses you for rheumatology arthritis or not. My rheumatologist went by my symptoms which really changed a lot my feet were heavy my legs were weak I had numbness in my fingers I could hardly move my fingers so all the all of these problems got my rheumatologist to figure out that I may have RA. If you’re having problems with your rheumatologist It can’t hurt to get a second opinion if you feel that would be helpful for you. Best wishes to you going forward!!!