Putrid odor and bitter taste (sometimes chemical) started aboutn2days post op. Now 6 days and getting worse. People notice-it is smelling up a small room! Soggy yellow stuff under the stitches (was gray the first couple days), but had a membrane initially placed over the bone graft. Lower molar was extracted because there was decay and smell under crown (was root Canaled) and furcation. Pain is nagging and itchy, taking Tylenol every 4 hours. Stitches are not red. Is my bone graft infected? Still taking erythromycin 300mg every 6 hours and salt rinses.