Heart attack? Heart problems?

I am a 15 yr old male. I am 6 foot 2 and 255 - 270 lbs. I dont smoke (Have only a few times, marijuana) never drank, dont eat entirely healthy, but do drink lots of water. I keep feeling out of breath, almost constantly. Only a few times, and this happened recently, I felt extremely dizy for a second, followed by palpitations. I drank water, and it felt as if the water was stopping hafway. I took a buffered aspirin after it slowed. I am feeling slight aches everywhere, in no specific place. For a couple of months though, i feel pains on the right side of my chest and in my right arm. Only recently have i felt it in my left arm too, but not anywhere on my chest, just on the right side. It is a sharp pain, in a small spot, like someone is pushing an ice pck through me. I also get these splitting headaches too, but they dont happen very often and only last 10 - 20 seconds. I dont seem to sweat or anything when these episodes happen. I dont feel nautious either. I do, however, get heartburn eveey now and then, and whenever i burp, i throw up essentially. Just a little bit, not much. Today i ate a lot of fopd, especially unealthy food. I walk just about everyday, but i didnt walk long today. I once had a hole in my heart, but doctors said i healed that up long ago. I have sinus tachycardia too. I also have clinical depression as well, but dont take any antidepressants. I used to use an inhailor too. What can you say based on all this? (Additional info: I have been tested, blood and ekg, they said i had a high liver count, and i had that sinus tachy. Npthing else.)