I'm only 15 years old and I know how rare it is for a person of my age to have a heart attack. However yesterday I drank two Starbucks espresso double shots and two diet cokes, however they were spread out throughout the day. Later at around 7:20 I felt very lightheaded and started getting heart palpiations. I was sitting at the dinner table and all of a sudden became really nervous and felt a discomfort in my chest. I also had problems seeing clearly, I mean I could see and read, but it felt as though someone put a filter over my eyes. So my father took me to the emergency room, and they took my blood pressure and heart rate, it was a little high for me. Later as the docter came in, she took my blood pressure and it was completely fine. However my face was rather flushed and warm, I looked rather pink. Every now and then as I was sitting in the room, I felt my heart rate go up, and sometimes I would feel a heavy pulse in my neck or in my chest, my fingers were colder than usual. My shoulders also hurt. They let me out of the hospital saying I had a panic attack and too much caffeine. I went to bed and as I was lying down I felt another pain in my chest. The docter had given me maalox but I am not sure if it was heartburn. Right now I am feeling pressure and a cold sensation in my chest and whenever I exert energy it hurts. Today I took maalox and it did not really help. So I am wondering should this be something I should worry about? Could I possibly be having serious heart problems at age 15? I am in good shape, I am a runner and I eat pretty well, I do not smoke or drink. What is going on with me?