I have been suffering with fatigue over a period of 8 months. I am looking for answers. I am 87 years old, but I am in good condition. I am in to ballroom dancing.During the last 8 months I have trouble finishing the waltz. I have been diagnosed with sleep aphnea, post nasal drip, and gerd. Also on allergist has given me the test for allergy. They found that I was allergic to 15 different things. However this may or may not be causing the problem. I may not be exposed to these allergens. I believe these 4 thing are somehow interrelated The sleep disorder place has ordered a cpap continuos positive air pressure pump with a mask. Hopefully this will solve the sleep aphnea. Re: post nasal drip: The allergist gave me 2 samples, both of them are mists. I have taken first one and then the other for 6 days now and I can not see any improvement. .Th allergist wants to put me on a long program of shots, probably years. I do not know whether or not medicare would pay any part of this. Nexium for gerd very expensive