Only a vegan diet ever helped. You probably have candida (yeast infection from too much sugar) and Celiac (the allergy to glutens) and that causes sinus problems. You must give up cheese and dairy, white bread, corn and soy. Etc.
I had this stuff, it was derived of corn and soy beans, and I ended up in the ER. My throat literally swelled shut.
Corn and soy is in everything. I can take soy, in small doses, but not the corn. Popcorn can make me ill for days.
Try some of the cleanses on here, including the Master Cleanse, and liver flushes. That should help and try the vegan diet, read about Celiac.