I think a rheumatologist can help. Here were the tests they ran on me. Most of these rule out something else.
1.. CBC with DIFF
2. ESR
3. CRP, HS-CRP **
4. HBsAG
5. Interferon Gamma, Serum
6. Hep -B
7. Anti-Chromatin Ab, IgC (RDL)
8. CCP Antibodies IgG/IgA
9. 14-3-3 eta Protein
10. Antiphospholipid Antibody APS, APLS
11.RF test
12. ANA - antinuclear antibody
13. Aldolase - With CK, ALT, AST
14. Interleukin 2 and 6
15. Pet Scan for cancer.