No medications every helped me, but last December, I have surgery to clean out my sinuses and fix my deviated septum. I still had a
sinus infection, which probably the worst one I every had, but from February to now, I have been pretty much symptom free, except from the occasional congestion from allergies. If you are willing the undergo the surgery, I would highly suggest it. It's an easy procedure, and I was back at school on the third day.
Good Luck!