If you have unexplainable fatigue and you do not know why, the reason could be Chronic Fatigue Immune Dysfunction Syndrome, aka CFIDS.
Have you ever gone to your doctor and your CBC showed elevated lymphocytes? If you do not know, lymphocytes are white blood cells in the immune system that fight off infections. Anyway, when they are raised that usually means a viral load, such as CMV, HHV-6, and EBV.
CELIAC, FOOD ALLERGIES AND HEALTH 