This all started like 2 months ago. It started with really dry mouth like i was choking and lymph nodes in my throat began to get big and red. The doctor i went to said i had post nasal drip and to take allergy medicine and i have for quite some time, it isnt helping. My dry mouth seems worse and i looked at my nose with a flashlight and my sinus look really inflammed, could this all be because of a sinus infection? And what can i do? Im going to go to the doctors again on monday but id like to go in ready. Im only 17 someone please help me.