Hi Welcome
you can have Both RA and Fibro - I Do
it can take a while and a lot of tests to actually get a solid diagnosis so don't despair
keep a journal of pain and problems take it to your specialist visit.
it can be very frustrating when you Know there's something Wrong but tests are inconclusive
but unfortunately that can be the way these illnesses go And Remember you can Always get a 2nd opinion and a 3rd and 4th
But just try to take it a day at a time and see what the next visit brings