My left sinus is blocked--after I use a saline flush there is white thick nasal discharge. There s a heavy feeling in the left ear and the left side of my neck. Went to the ER and they prescribed Zithromax. I took the course, felt a bit better but the sinus still gets blocked and the left ear is still a bit blocked,and the heavy feeling in the neck is there. Feels like I have to clear the side of my throat a lot and I have to spit up thick white mucus.