I've been to 2 allergy doctors and they think I have something autoimmune. I'm in bad constant pain. My lupus test was negative. What could it be?

R/O CVD. CVD = COLLAGEN VASCULAR DISEASE. The classic ones are LUPUS & RHEUMATOID ARTHRITIS. UCVD=UNDIFFERENTIATED COLLAGEN VASCULAR DISEASE. This means that you have some but not all the criteria to meet a specific diagnosis. It may take 5-10 years to meet specific criteria. There is also autoimmune thyroid disease. Get copies of labs & records.and see a rheumatologist .