Hi, I am having shortness of breathing not too much for past 1 week. Also I am having some pinching effect in my left chest sometimes noy continuous. While I panic or thought about it and get afraid I get the SOB high. I also have some blood tests and today I do Echochardiogram and the radiologist told me that there is nothing to worry about. My EF is 65%. Can you tell me if it is due to any kind of heart disease or due to cold or dust allergy or anxiety??