My friend had taken emergency contraceptive pill within 2 hours of unprotected intercourse twenty days before... Now she's on her period which started a day before.. Unlike the other months there's no heavy flow and seems like it's gonna last for just a day more though blood clots and deep color is visible.. Can it be the signs of implantation bleeding or the effects of the pill even after 2 weeks? Really need to know if there's still chances of her getting pregnant and whether she needs to go for a pregnancy test?