I am a singer and have been struggling with mega phlegm in my low register. (E above middle C down to F below middle C) The phlegm at times feels so thick that my vocal chords for a second seem paralyzed. They best way to describe this sensation is that I feel like I'm singing through molasses. Pitch problems occur and sometimes the pitch will even change on it's own! I know I am compensating by tensing throat muscles to create pitches (which is probably not good). What is even worse is that this has been going on for years. I don't have this problem at all in my high register. It's very frustrating and I'm starting to wonder if something is wrong. What should I do?