I Have Had A Chronic In My Throat For At

I have had a chronic in my throat for at least a year now. To me it seems that this started after I had 2 bouts with pneumonia last year. I rarely have a productive cough. This problem has affected my singing (I sing in choir and solos in my church). I know that this is not related to reflux as I am under a doctor's care and have had 3/4 EGDs in the past. Any suggestions will be appreciated.