Thank you for responding so fast. I had recent blood tests which came out fine along with a normal thyroid level. In my question, I forgot to mention that I had heart failure three times last year and there is a significant history of heart trouble on my father's side. All the male relatives died in their early fifties. I also experience chest pains at times. When I asked him about getting more and more tired and short of breath, he mentioned something about angina. Can this be? Could the problems with my heart be getting worse. I am under the care of a cardiologist and am scheduled to undergo another echocardiogram in March.