From last few months I could feel that my cough tasted different. Today i coughed a lot in the afternoon and I could feel something in my throat. I opened my mouth and looked into the mirror and I was able to find some wierd swelling on the left side. I touched it and that thing bursted and a yellow liquid came out of that. It was like pus. I had the same taste that my cough tasted like. Please tell me if there is something serious.