I love @sueinnm's perspective! If you read the autoimmune support posts, in time you might see that it can take years for an autoimmune illness to be diagnosed. For me it was 10-20 years before I had a diagnosis of seronegative RA. But recently my rheumatologist has said, We may have been treating your psoriatic arthritis as RA. He is kind and meant: the treatment would be similar, the important thing is to continue to see what symptoms manifest and find treatment.

You don't say why you are asking this. Maybe you've been in the same place!? with pain (is pain) that needs to be addressed.