I agreem its sounds like a classic case of sinus infection and antibiotics will clear it up, but in order in prevent it getting out of control again, ask your doc about a med called Fluticasone Prorionate (Flo-naise) It will control the allergens that cause problems to begin with. See if perhaps it will help you. It is a sinus spray you use daily. Good luck and feel better!
To me, it sounds like a possible sinus infection. I'd suggest seeing your doctor.