Had unprotected sex around 5 days before her period is due and took I pill within 12 hrs. After 4 days of I pill she had bleeding which continue for 4 day. Now we are confuse if it is widrawal bleeding or her normal mensuration. An we also did home pregnancy test on day 10 and 17 from the date of unprotected sex which come negative. Can you please tell us when can she expect her next period and should I concern about pregnancy. Please help