Hi, this is NUPUR from Bangladesh!My menstruation stays for 5 days only!in the 5th day ,when no blood is seen, then i took a sex with my husband!After for 2 hours it started to blood again and stayed for that day only.after that ,I took a sex again after 5 or 6 days later and took 1 medicine which is sayed about the 72 hours system.Now,After the second day of sex,it is 7 days later today. It started to blood like a irregular menstrual problem which is first time in my life.Moreover Doctor Detected that i have a little polyp in my Endometrial .On the other hand i had an unexpected Miscarriage in april,2012 due to my Excersie.So,what do you think about my problem about this type of irregular bleeding.please answer me.