Help!? TMI alert!

So I ovulated Sunday, me and hubs had sex twice then I was scheduled for a cervical biopsy Monday afternoon. AF expected on 11/17! The doctor told me I would experience brown or grey discharge after the procedure due to the medicine they used on my cervix. Tonight, I experience mucus that was tinted pink and also had strings of blood it looked like. Could this be implantation bleeding or something from the procedure? Any advice would be great!