Hello. I have some issues with my throat. About two years ago I had a deviated septum correction surgery. I was left with a never-ending excessive post-nasal drainage that flows continuously down my throat, making it very vulnerable to infections (I get one at least monthly) and which slightly inflamates my vocal folds. It's really affecting my singing, as I have to take numerous brakes and I've also been told by my coach that it adds an unwanted high frequency to my timbre. I know this is quite a medical question but I'm looking for as many opinions as possible. Can someone please offer some advice?