If your doctor is prescribing antibiotics, and they are working a little but not a lot, then the doctor has diagnosed a sinus infection. The reason the antibiotics may not be working is that infected mucus becomes encapsulated and antibiotics won't penetrate it. The Mayo Clinic figured this out, and I found a way to remove the infected mucus. Regular sinus irrigation often doesn't work, because gravity won't allow saline to get into the upper sinuses, where your infection is probably lodged, but this technique defeats gravity. It will also shrink the inflamed tissues and open you up for further drainage. It should take about 3 or 4 days of flushing before the infected mucus comes out.
The Flip-Turn Sinus Flush is mildly risky, because you have to bend over to do it, preferably in a shower, but you can also do it outside on soft ground, or you can kneel down and lean over a bathtub, or perhaps a plastic basin or tub, with the shower running for steam.