I started having symptoms of a cold last Friday with sneezing, coughing and very runny nose. It is not getting better, but what concerns me is that sometimes when I cough or breathe I hear and feel fluid vibrating in my esophagus all the way down to the middle of my sternum. It makes me cough very long and deeply. My chest and rib cage has become sore. Should I be concerned enough to make an appointment with my doctor?