Help! 16 years old and having heartburn a lot!?

Okay so I'm not completely sure that it's heartburn, but for quite awhile at least twice a week I will experience a burning feeling in my chest. It hurts to the point to where i feel like I cant inhale. It only lasts for like a minute, then it's done. But a week ago, i was at my boyfriends house and it lasted a good 10 minutes. I was crying and was in excruciating pain and he almost called 911 but i persisted that i was fine and it went away. I'm only 16 and eat just like any normal 16 year old girl. I make sure i dont kill it with the sweets so i'm not quite sure what's wrong with me. I am also fairly active. What could be wrong? What should i do?