Im 13 and my heart hurts, it started today when after lunch I drank some cold water down, instantly i felt i had a stomache ache and i felt bad, i waited untill after school so i can go home to the bathroom, i noticed my heart was not feeling very well so i beated it like a gorilla, after it got worse and worse, when i was sleeping i can feel pain every so often and im VERY nervous. PLEASE RESPOND!!!!!!!!!