I was wondering if it is possible that I pulled a muscle in my chest, for the past two days it has hurt to take deep breaths and it hurts to lay flat. I have no numbness in my arms or neck. What should I do? I do not want to go to the emergency room. I t is Sunday and I would prefer to go to a doctor s office on Monday but I do not want to be checked in and have to do all the tests and stay overnight for a pulled muscle.