I don't know where you live, but in the southern United States, the ear-nose-and-throat specialists are diagnosisng a lot of chronic sinus conditions as fungal infections. It is very possible that you also have one of these chronic sinus fungal infections. They tend to last indefinitely. But, it sounds like you are successfully removing some of the long standing gunk in your sinuses. Yes, oil pulling works for the sinuses! Keep doing what you are doing, and also pay special attention to your diet.