Can I pull delay the mensuration beyond one week? My sister had unprotected intercourse on fifth day of her period (last day) but mid September, then she took Ipill next day. He did not ejaculate even once . She had very light dark brown to light red clots and spotting on 3-5 October. She got home pregnancy test done thrice, which were negative, it's 9 November but she still is not getting her periods. So does this mean she is pregnant? How much can the Ipill delay the periods.?