What is this film? Tooth extraction.

I had my wisdoms pulled Sat. the right side is giving me many problems. The roots were fused on that tooth. Well I've been passing tiny spongy bone fragments. I also believe I've gotten some infection going on on the right side. So I took a mirror and looked to find a whitish type film in the socket. It is kind of thick and it's stuck to the gum. You have to tug it to get it off. What is this? I've never seen or heard of any such film. It looks like that same type of white film that you sometimes find in a piece of lean roast. I'm heading back to the dentist tomorrow. But any advice would surely help as I won't be getting any sleep tonight because of the pain. Tweet