Hello Doctor. Thank You for helping us. i want to ask you for Postinor. Once i have used it i have had vaginal bleeding but i don;t remember the dates comparing with menstrual cycle. so please ,if you can , help me with this question: i finished my menstrual cycle on Saturday or Sunday ( November 9 or 10 ) . If i take Postinor this Sunday ( on 18 November) , after how many days i will bleed again ?