when is your AF due ?!

Mine is due December 5! Well it's complicated actually. My AF was due November 27 (today) but because I O'd on November 20 & got inseminated on November 21 my Nurse Practitioner said AF might be pushed back to December 5! I'm hoping it doesn't come today because I think I had implantation bleeding yesterday! I've never had it so I'm not 100% sure but I think that's what it was! It was brownish/pink and only when I wiped! Today is 7dpo!