HOW CAN I TELL THE DIFFERENCE BETWEEN A HEART-RELATED PROBLEM THAT CAN BE SERIOUS (I''VE RECENTLY BEEN DIAGNOSED WITH THE POSSIBILITY OF HAVING A HEART MURMUR) AND ANXIETY OR PANIC ATTACK? JUST ABOVE MY COLLAR BONE I SOMETIMES GET A CLOSING FEELING AS IF MY THROAT IS TIGHT PARTICULARLY WHEN I''M STRESSED OR NERVOUS ABOUT SOMETHING.

Optional Information:
Female, Age: 50, Pennsylvania