Just because nothing shows up on x-rays doesn't mean you do not have arthritis. I was diagnosed with RA by blood tests, not x-rays. I do have swelling on my joints but it wasn't as bad back then than it is now, and my doctor based his final judgment on those blood tests.
Yes - the seem to agree that it is arthritis. They just don't have anything in the blood except high sed rates to show this yet.
As long as this body works, I am going to enjoy life to the fullest for each second of every moment that I can.