Me and my fiance had unprotected sex 3 days before her periods though i didn't ejaculate inside her vagina.she had periods one day before her date but she insisted on having an ipill.she took an ipill during periods which lasted 12 days and ended on 28th April. Has her cycle been changed due to the prolonged periods because she hasnt had her periods which were due on 17th May as per normal cycle or she might be pregnant.please advice