thanks 4 the suggestion. i am considering it.
Go to the chiropractor. It sounds to me like you have a rib out of place and yes, it can cause coughing, etc. It may take more than one adjustment. I am not chiropractor, but I do see one and have things similar to what you are describing. In fact, I am going to see mine in the morning for chest, rib, and back pain. Good luck and hope all goes well for you.