I am a 58 y/o female who has been spitting clear thick bubbly saliva for about one year. Prior to spitting , I get a cough with no production. It sometimes makes me teary eyed. The cough is immediately suppressed if I drink water, but the saliva begins and is a lot. It feels as if it is lodged in the back of my throat and runs from my nasal sinuses. What could I do to relieve this?