Me too! Me too! Plus allergies to almost everything. Indoor, outdoor, seasonal, you name it.
One thing the allergist said last time I was there was that acid reflux could be the cause for my sinus problems. Haven't started treatment yet, but if you have frequent acid reflux that may be something to ask about.
I had surgery a few years back to clear out my sinuses. Said they made a bunch of little cavities into one big one...one on each side of my head. The ones in the front. Fixed a deviated septum while they were in there that is mysteriously still deviated

Neither operation had any effect.
I agree with everyone that the neti pot/salt water will help. Have used both, but am not dedicated like I should be. I do notice a difference when I spend two weeks at the ocean every summer, as well.