Hey there lilsarrygrlo5. I have a few things to say on this whole thing.
1) go to the doctor now, you can do it by free will or wait for a medic to haul you there in the back of an ambulance.
2) yes it could just be heartburn, but it could also be stress induced. Sounds like it is most likely the cause, having said this.... Your body is reacting to the stress by causing chest pain which says to me that the increased demand on it is causing a number of things to happen in your body ( lots of techo stuff so I won't bother unless neccessary). At any rate you are young and this should not be happening, so you need to get checked out. THIS IS NOT NORMAL OR JUST HEARTBURN UNTIL YOUR DOC SAYS SO!
3) did you know that most women present angina and heartattacks as heartburn or indigestion! Yes you heard me and I don't care how young you are it doesn't matter, it could kill you! I can name at least 5 people ages 19 to 23 that have died in the last 9 months from a heart attack, only one was male, Yes I have seen it personally. Yes they were healthy fit people, so plz don't gamble with your health.
Ok I won't preach anymore but you need to be a little more serious about what your body is telling you. If you aren't then what are you exercising and eating right for?? To look good in a coffin? Chest pain is not ' nothing to worry about'.