i have taken i-pill tablet first time after unprotected sex on 15 aug..i pill was taken on 17 aug,my period date was 4 aug and now its 17 sep,but my periods not come..i tried 3 times pregnancy test ..but test is negative..i go to doctor also ,she gave me a tablet name susten 300 for one week..but no effect till now..pls help..delay in periods is normal after taking i-pills and how many days should i wait..please help ,i m in tension..