Ive been experiencing a dull pain in my chest (both sides) for the past couple of weeks which feels like it may be from the muscles in the middle of my rib cage and underneath my breasts. The pain doesnt get better or worse with exercise but ive been feeling a little more breathless than normal and sometimes feel like my heartbeat is faster than it should be. Im not sure if its related, but ive also had slight tingling in my hands every now and then, particularly after drinking alcohol. im 22 and relatively healthy though i dont exercise as much as i should and i had tonsilitus or strep throat about 3weeks ago which i treated myself using betadine mouthwash instead of antibiotics. what could possibly be causing this??