Hi, I had 4 teeth extracted 4 days ago for braces but the bottom molar I had removed looks like it has a grey ish/white ish film over it, it also smells and tastes weird there was problems with that particular socket not stopping bleeding but seemed to after a while. I'm not in much pain other than the swelling and tenderness, was just wondering if this is how it's meant to heal? Or if it sounds infected?