I know people think that I am a fraud at times. I ran a marathon I must be in good health. Many times by 5:00 PM I am just totally wiped out. The fatigue is really bad some days. I know a big part of the problem is I don't sleep well at night. I have AS and MS, both come with fatigue. My neurologist said it is hard for her to tell what symptoms are caused from the AS, and which symptoms are from MS. I don't dare tell anyone at work that I have AS, and MS. I know it will come out someday, but for now I just keep it to myself.
good luck, and keep up the fight.