I recently had an upper endoscopy on Thursday 02/22/2018 and I m having a terrible sore throat. It hurts to swallow, sneeze, cough. I cough up some phlegm but it s just clear and no color. It feels so raw and achey and nothing really helps. I ve taken Tylenol, hot soup, hot chocolate, water, lozenges. Nothing works. I m having a ton of gas whenever I drink or eat. I m debating on going to the ER but they probably won t do anything.