Hi, i ve been experiencing some twitching on my chest above my left breast, (Not on the side my heart is on) and i get it when i exhale deeply. I dont know if im just paranoid or what, because i was just in the hospital for painful stomach cramps and we thought it was appendicitis, but after an ultra sound, we found it was not, and it might just be a virus, so please just explain what this might be or if it s simply nothing.. thanks.