Chest pain for 4 days?

I'm an active 16 up year old and have been experiencing chest pain for the past 4 days. It is constant but gets really bad right after I eat. I'm thinking that I have heart burn but should I be worried that it could be serious? I was sick last year and along with numerous test had an ekg done. Everything was good. That was over a year ago. Could something like an aortic aneurism form between that length of time? The only family history I have is my grandmother having an aortic dissection and having to get a valve replacement. Thanks for the help!