Throat Disorders?

my dr thinks i have a sinus infection i finished a course of zithromax and no change..my symptoms are headache,pressure in my throat area especially when i bend my head tightness in neck and other symptoms that i dunno if there related is occasionall ear pressure,thick mucus occasionally in nose and when i cough comes up..the area of my throat where the pressure is is mainly on the left side and after looking at a throat diagram from what i see theres 3 things that can cause problems in that area larynx,trachea,epiglottis..are there any disorders with these 3 things that can cause symptoms like mine