I am not a doctor but I love doing research and learning new things, so I have been trying to find a diagnosis for you.
Could it be LPR?
uthscsa.edu/oto/lpr.aspNo matter what it is, I recommend going to see an ear/nose/throat specialist (Otolaryngologist). They will most likely be able to diagnose what's going on.
Best of luck and keep us posted,
-Cat