I would start on echinacea from Dr. Schulze (800-herbdoc), 2 ounces per week for 4 weeks. I'd be eating 6+ cloves of raw garlic. Eating and cutting onion and horseradish in order to drain the sinuses. I'd start the day with Superfood, http://superfood.andmuchmore.com
I would add a few drops of Herbal Eyebright from www.herbsfirst.com directly to the saline solution. I started with 3 drops per cup, working my way up. I'd take cayenne extract from her 4x per day. I'd purchase deep heating balm - rubbing that on the affected sinus (brings blood there).
If the eyebright was not showing any effect after 1-2 weeks I would try putting a few drops of NutriBiotic's grapefruit seed extract in - starting with 2 drops per cup.
Finally I'd bowel cleanse, Intestinal Formula 1 & 2, from http://superfood.andmuchmore.com
I'd juice fast, hot cold showers, etc. I'd try anything during that final 2 weeks to avoid making the surgery decision. I'd drink licorice and ginger tea as well as eating turmeric - all to help with inflammation.
I'd use the waterpik for its intented purpose too! Plus flossing 2x per day.