It looks like maybe the Xylitol in the Xlear is keeping pathogens from adhereing to the sinus cavities. This could be a good thing. Here's a link to great articles on xylitol:
You might want to go to the doctor for good measure. My sinus story started when my dentist noticed something strange in x-rays of my sinus area. Something he'd not seen in his 20 yrs. of dentistry, so startled he referred me to an ENT who needed a C-scan that later revealed nothing... A week later whatever was there had evidently moved! Already suspecting parasites I continued to cleanse and treat. But what a surprise I got when I caught a terrible head cold a few months back and used Xlear and drank tea sweetened with xylitol. I began blowing macro funk that is obvious verme. At least 7 of these bloody beasts exited my sinuses, and I believe, because they lost their ability to ~adhere~ since the Xylitol countered the yeast/bacteria/fungus that are part of the whole nasty parasite package. I'm going to try loading an image but it may show way huge... I can't figure out how to reduce the image size.