My friend had unprotected sex 4-5 days before her periods started and then she got her periods 2 days early. Now it's been 18 days since she had sex after periods and it's her ovulating periods and the last day of ovulation. Today she saw dark red sticky spotting on her underpants. Does this mean she's pregnant or something. I guess pregnancy is not possible because obviously she had sex before her periods and got her periods afterwards. Also she gets spotting almost every month during the end of her ovulation cycle but this time the spotting was a little heavy and reddish than before. Is she pregnant ?