I m on my third round of antibiotics for a sinus infection. Have seen two different practitioners and don t have any answer about this except it s a sinus infection. Large (up to 1 ) globs of mucus are coming out of my sinuses. At first, just the back ones, now they re coming through my nose. They are grey to light brown and the consistency of a gummy worm. I don t have much drainage. I won t see them for a day or so, and then all of the sudden one comes out. What is this?