I have seen a large number of physicians. I have a history: 44 years of diabetes 1, and survival of small cell lung cancer, diagnosed in 2003. I am currently afflicted with an overwhelming fatigue following physical work. Thus far, no endo, cardio, neuro, sleep, or gastric doctor has been able to improve my functionality or even make a diagnosis beyond the fact that I ve been through a lot, lucky to be alive, you re 65, etc.