This is actually pre-Whole 30, but...I too had major sinus issues a few years back, and it got to the point where I had surgery (which I paid for mostly out of my own pocket). Later that year some angel of mercy steered me towards gluten-free/wheat-free eating, and the difference it made was enormous.
Of course I fell off the wagon, with painful results (e.g., on descending planes) but since doing the Whole 30 I have avoided wheat and gluten completely. I don't think I'll be falling off the wagon this time...the very thought of eating a baked good causes a twinge in my sinuses...