For the past 3 days now I have had a very dull but uncomfortable pain in the left side of my chest, arm, armpit, back, and even my throat. These symptoms have left me with quite a few scares recently and have caused me to lose sleep over. I don’t regularly get that much sleep and the only know condition I have is Acid Reflux. I’m not sure what this is and I just need help understanding. I am 19 years old.