Hi there!
I know this an old post of yours but I was doing research on the internet and came across your question/comment regarding chest pains. I have been feeling the SAME thing and now I have figured out the pattern that it's before my period. I am soo glad to know there are other people feeling the same thing. Not that I want others to be in pain but at least I know it's not in my head. From what I've read it could be hormone related (perhaps you are too young for that!) I was also researching and came across something called PRINZMETAL ANGINA. Gotta read some more. But yes, I have chest pains that feel like serious heart bur, almost like I pulled a muscle in my sternum area or something. I am curious, have you had a resolution to this problem or seen any doctors. Hope you feel better. Thanks