I had sex with my boyfriend on 5th day of my periods that is on 5th august(period started on 1st august) I started bleeding right after the sex, I took unwanted 72 within 7 hrs, I was lightly bleeding for 4-5 days after taking pill.now its 31st August and I haven't got my periods and I had sex again today. Do I need to take emergency pill again? Plzz help me... am I safe or not?