Before I gave up on this situation, I'd be seeing a rheumatologist to rule out any autoimmune disorders. There are some autoimmune problems that will initially test negative and later show up in the bloodwork as positive. Sjogren's is one of those. It takes an average of 7 years to become positive and some people never test positive with it.
Sore joints are one of the tell-tale signs of autoimmune disease.
Have you seen Liza Jane's charts?
www.lizajane.org
Billye