Well, seeing as the OP hasn't been back, I can only hope she's doing ok and feeling better somehow.
My question about how advil was being taken was never answered, but I'll offer my $.02 anyway.
IME many people under and mis-use ibuprofen. You don't stop taking it when the pain goes away because you then lose its anti-inflammatory benefit. If you know your sinuses are infected (or you have some other type of inflammation) you continue to take it round the clock, every six or eight hours, at least. You also have to take the correct dosage, which is generally in the 600mg range for significant pain (which is usually caused by inflammation). If you keep it up, chances are pretty good your pain will be fairly well managed. Note, that may not mean completely gone, but it will be significantly lessened. Adding in some hot tea and warmth, etc., can help with the rest. No question, an uncomfortable condition to have (and yes, I've had it, too); just make sure you're taking your Advil correctly so it can do it's job most effectively.
Good luck!