I have had annoying left upper rib pain for almost 3 days now came out of nowhere, I do not have a job so I am at home.. I don't remember injurying my left side. I have asthma and restrictive lung disease, GERD , and I've had heart surgery when I was five years old and like two months ago they said my heart was fine. My question is should I wait it out or go to the ER?