I am 23, 5'1, and about 175 pounds. I was born with pulmonary valve stenosis and had angioplasty done as an infant and at 5 years old. I just visited a cardiologist that told me I had a leaking valve, and that I should be fine. I didn't mention that Im a social smoker, and I've just been feeling very lousy. My chest gets tight, my heart races so much that I get dizzy spells, my legs swell, I cant breathe well when I lay down, and I sometimes get coughing spells. Should I be worried?