My Husband Is 73 And Has Not Been Sick Much

My husband is 73 and has not been sick much in our 50yr. marriage. one major HepititusB in the late 70's. About a year ago he had a time of shortness of breath and tiredness, Family doc sent him to a pulmonary specialist ,but he checked out with no problems. For several months now he has been so fatigued that he sleeps 9-10 hours at night and a 2-3 hour afternoon nap, He also has a cough to cough phyleum and mucus. He has an appointment with a cardiac specialist on Monday. He also snores and moves in his sleep. He may have some Vitamin D deficiency, Thyroid or low male harmones. He takes NO meds. 1 low dose aspirin a day. Can only work a few hours without a rest.