Hi I had a heart murmer as a child and it went away. For the past few months I have been getting a sharp pain in my heart like someone was sticking a knife in it and twisting it. It leaves me short of breath. Also I am getting short of breath mopre than normal. I alsop have had a cough that hasnt gone away for a year or two. I am 20 years old. I have done some reading that these symptoms can relate to a re occuring heart murmur. What should I do? Please respond by email that I left.