Wow. Now that is an interesting twist. Maybe your living environment is harboring some sort of microscopic allergen or particle that is continuing your sinus inflammation. Think about what you could do to eradicate it from the interior spaces.

Consider: Super deep cleanings of the floors, carpets, windows, surfaces? Washing the walls? Cleaning the air ducts? Running an Oxiclean load into your dishwasher and washing machines? Spraying isopropyl alcohol on the fabrics of the furniture and into the air to kill the pathogens?

I don't know - but you are onto something. Figure it out and report back!