Hello to all, I am new here. I found this website as I was visiting my cardio team's webpage. I have been having some test run for my heart. I'm 37 years old and have no other health problems except for underactive thyroid. I am experiencing shortness of breath (with little excertion), fatique and my heart feels like it's going to jump out of my chest sometimes. I have had a little pain from time to time, but nothing unbearable. Anyone out there had any of these symptoms?