Ironically, I do have sinus ha ha. Have been having this for the past 2-3 years. It's terrible and it makes you feel drowsy and grumpy. It's even worse if it happens while you are sleeping.
I've tried everything but it just doesn't stop. Haven't had serious issues with it for the past two weeks though (Except for some light sneezing today, not so bad as it usually is though) but that's probably because I finally cut down on some foods.
Problem is most of them are my favorite foods.