im a fifteen year old girl and since last night have been experiencinf a dull pain in the left side of my chest, inside my ribs. it feels like my heart. i get worried easily, and am especially worried lately because on Monday a girl my age died in her sleep from heart problems. i think she had problems all her life, but i have been quite nervous and worried this passed week, and also stressed because exams are starting. i am recovering from a chest cold where i got a nasty cough and lost my voice. i have no pre existing heart problems, my heart rate is 80bpm and i do 3hours of netball a week. it is only really there when i think about the girl, or if i think bout the pain, and it sometimes passes.from my left to right side. i really dont want to die like this girl did, please help!