I went to the Doctor a few days ago and she told me I had a heart murmur. She set up an appointment for an echo cardio something. No one has ever told me I had a heart murmur before so i think that possibly it just kinda popped up. I've been feeling weak, tired, shaky and having shortness of breathe. Is this normal? Does it have anything to do with the heart murmur. I'm a little worried about it. Thanks for all the answers!