Are you using a nasal spray? Don't use Afrin because that causes a rebound effect. Your Dr. should have some free samples, get them and use it. Along with the anti biotics it really helps. Nasonex is an example.
It could be allergy related. When I lived in Oregon I always had sinus and yeast infections. The molds there wreaked havoc on me.
Also, with some really bad infections you may need up to 30 days of anti biotics! The other thing I find helpful is warm compresses and massage. Start feeling around on your face where it hurts. You will be surprised what you can make feel better with this. Be careful around your eye area, sharp nails can cut when massaging.
I actually push carefully deep and up into the eye socket (feeling the underside of the bone) above, below and the entire eye. Go around it like a clock. You will feel pressure and pain and possibly nodules. Gently massage and or push for a bit on the nodules.
Around the cheekbones too.
The key to this is experimenting. Pay attention to where it hurts (and feels the best) after massaging.
Lots of fluids to flush toxins. Vitamin C, airborne, stay away from refined carbs and sugars (they seem to aggravate mine so who knows)
Last resort is surgery.