Did you look up Celiac disease? There are so many symptoms that are so common to many other disorders. Celiacs is an auto immune response that caused your body to attack the small intestine and damages interfer with nutrient absorption. Causes anemia, fatigue, brain fog, osteoporosis and other nutrient deficiency disorders, can cause you to be lactose intolerant and apparently a lot of digestive disorders and diarrhea. Sounds God awful.