So I did flonase for a while, and at one point was doing flonase and Azelastine together. But now I pretty much just do a saline rinse every morning and night with a Neilmed bottle and saline solution. That helps keep the sinuses clear, though it's not perfect because I still get inflammation. But I do notice that as my sinuses flare up, so too does my breathing. It becomes more difficult, but when my sinuses are clear, I don't notice the air hunger nearly as much. I would still try to breathe through your nose as much as reasonably possible, and also with your diaphragm as much as possible and not so much the chest.