My husband had a heat stroke about 10 years ago, then on Sept. 30 he became very ill and has not felt good since then, It was very hot when we played golf that afternoon.......now he has no energy, does not want to do anything, sleeps about 14 hours a day.? Dr. has done EKG, carotid artery exam, stress test (which he passed with flying colors. He always played golf 4 days a week and now he will not go at all. ???