I lost my virginity and the condom broke four days ago. I took Plan B about 30 minutes after the incident. I expected my period within these next few days. I got a somewhat heavy flow of blood today but it's gradually getting lighter. Was that my period or is that from the pill? Is there still a chance of pregnancy after this bleeding as I've read that it is the uterine lining being cleaned out which is also preventing pregnancy. So is this a sign that it's working? Thank you so much.