You can try nasal rinse with some homepathic or herbal antiparasitic supplement. I do iodide. Msm, baking soda, essential oils like tea tree, peppermint, lclove oil, eucalyptus oil, Black-Walnut hulll herb. Watered down of course like a drop to 16 ounces depending on how sensitive you a to these antimicrobrial oils. Olive oil too.
I don't know what you have at home but you'd surprised what can clear the nose and temporarily allow you to breath and keep ot at bay. Ithese also act as a supplement to your rx medicines. You have to throw alot of things at this and it helps. Above all stay calm. Aggravating thoughts tend to create an inflamatory response which happens to be th idal environment fo parasites.