Hi K.,
The doctor noticed my heart murmur when I was 5. After a few years before 10 we were told it had healed because they didn't hear it anymore. Well at 17 I was told you have a heart murmur. Anyway I am 44 now and have lived with a heart murmur my whole life. About 10 years ago my doctor was very concerned about it and sent me to a cardio. He said from the way it sound I would need surgery. I had an echo, endoscopy to see my heart and finally a heart catheter. In the end the whole wasn't as big as they thought so no surgery needed. I go every 2 to 3 years for an echo so that they can watch it.
When it feels like your heart is beating out of your chest those are heart palpatations. I take vitamin E and its is good for palpatations. I also take Vitamin B-12 and fish oil. When you go to the cardio ask him about these. Usually heart murmurs are found in women and most of the women in my family has it. One male so far. It sounds scary but many, many people have heart murmurs my cardio being one of them. Good luck to you. I hope everything works out for the best.