Hi doc.i had sexual intercourse on 12 of sep,and I used postinor 1 immediately,so after a week I discovered that I was bleeding,I went 2 my doc n told him abt it,so he said it I was d drug I used,and that I should stop using it,so he gave me an injection to stop the blood.....so am to menstrate on d 12 of this month (oct),but am yet to see it....pls I want to know the cause