implantation bleeding would occur from days 7-12 after ovulation. So only a few days before your expected period. It can be a spot on the toilet paper to a spot on your panties to being more than a spot. Not every woman gets implantation spotting though. it even varies from one pregnancy to another for each woman. I've had it twice but been pregnant four times. hope that gives you some idea. if not you can always research the topic online more.