16/8/18 me and my girlfriend had protected intercourse but the protection slipped off while removing and some semen fell on outside the opening of labia. She washed it properly and nothing was inside. To be sure she took an emergency contraception ipill. This is almost 8 days before her periods and her periods are regular on 24th of the month. Is there any chances of pregnancy? When can she expect her next period? Will her period be on same day? What to expect after the ecp?