Hi, I Had A Tooth Pulled About 3 Months Ago...2

Hi, i had a tooth pulled about 3 months ago...2 weeks after it was pulled they had to go back in to close a hole that was in my sinus cavity. We waited about 1 month and when i went back the hole had not completely closed up. he wanted me to have the closure redone and i told him to lets wait an see if it would close on its on. Well its been 3 more weeks and i could tell the hole was closing but all of a sudden i had this bad taste in my mouth and the smell makes me sick to my stomach. I went back to the Oral surgeon and he put me back on antibiotics due to sinus drainage. Well i have been on the antibiotics for a week now and the smell and taste still make me nauseous. What is going on with my sinuses? What should I do?