I have had so many different problems in the past three years. They started from running too hard, when I would get diarrhea while running, and after which I would feel nauseated and sick, as though I were coming down with a virus. I would go to sleep, then wake up feeling fine. After about a year of this, my health seemed to not recover from the running sessions. I would feel sleepy, foggy minded, and had a lot of digestive problems whether or NOT I went running. My doctor...