It could be possible that you have sero-negative rheumatoid arthritis. I do. It was diagnosed by my doctor who is from Russia and then by the rheumatology dept at Mayo Clinic in Rochester, Minn. This was done with x-rays because sero-negative means nothing shows in the blood. They did matching x-rays of both sides of my body and I had the markers for sero-negative rheumatoid as well as a spondylarthropy. (arthritic lower spine) My sed rate is normal. I've had both knees replaced and both little fingers have joints replaced. I am currently in remission from the rheumatoid thanks to methotrexate and Humira and low dose prednisone. I hope some of this helps.

Also I agree with Glenntaj. That B12 is a red flag to me. Way too low.

Billye