i am 20 years old and for the past 3 days i have been having these weird episodes of chest pain , so bad to the point where i can t stand up and i get really short of breath and start to sweat. as soon as i lay down and just relax for a couple of minutes, they go away, but it keeps coming back. even in between the attacks, i feel kind of weird, and i don t have an appetite . i can t figure out if it s just really bad heatburn and maybe a stomach virus, or something more serious...