I am exhausted ALL the time. I was away and woke up with back pain that radiated to my stomach, chest and arm. I felt naucious. Also, about a month ago, during an orgasm, I thought I was having a heart attack. I couldn't breathe, my chest compressed and the pain radiated down my arm. I am seeing a cardiologist in two weeks. My father's side of the family all died of heart disease, my dad died at my age. I eat a healthy diet and I exercise. I don't drink nor do I smoke. I take supplements. What could possibly be ther eason I'm just SOOOOO tired, I feel like a truck hit me every night.