Dear Doctor, My girlfriend and I had unprotected sex on three occasions. On an interval of about a week between the three times, and she took postinor 2 on this three occasions. Now its been like a week when she was suppose to have seen her period but she hasn t, but two days ago she saw just a stain of blood not the way it has always beeing and it was unusual. She is worried, what can u advise us to do. I will be happy if u treat this as urgent. Thanks. Castro