I'm apart of the Lupus group as well since our medications for the autoimmune diseases are the same. They recently made a post on Lupus headaches. If I had to bet, I would say auto immune diseases or neurological disorders. Btw, you can always ask for second opinions too.
DX: Wegener's Disease, Migraines, Diabetese Type II, PCOS, Lactose Intolerant, Benign Heart Murmer, Asthma, Asperger's Syndrome, Necrotizing Gramultous Inflamation in eye, A.D.D., Acid Reflux
Medications: CellCept, Prednisone, Tri Nessa, Percocet, Metformin, Prilosec, Protonix, Zantac, Advair, Cingulair, Albuterol, Calcium + Vitamin D