I am 18 years old female. I am now having a back pain on the upper left hand side between my spine and shoulder blades and my left arm is also paining. A few moment earlier, my right chest hurt a bit but now it is gone. I look up my problems on the internet and looks like one of the heart attack symptoms. However, since I have no other problem than the back and arm pain I don't know what else could be causing the pain.