I have pain after tooth extraction and bone grafting, what could be the cause?

Tooth extraction and bone grafting done 7 days ago. Pain started day 2 and is progressively worsening. It is intolerable past couple days despite advil, tylenol and pain pills. I have been on antibiotics, peridex rinses and trying salt water rinses. The salt water rinses bother it worse. Please help me to understand what could be going on. I don't think anybody is believing me on how bad this pain is.