Yesterday while playing golf, I suddenly felt like something hard and cold was in my. Esophagus or upper chest. I think it s possible that I may have taken a sip of ice cold water prior to that, but not sure. This feeling lasted for almost the full back nine, just about 1 1/2 hours. I also became distracted, and unable to focus on what I normally would, but think that may be caused more from concern and uncomfortability. Do you have a possible diagnosis?