When i will get my periods as i told you i have taken i pill after sex on 19 and on 24 i started my periods al?

already i told you that i got my period on regular date i.e 12 and i had sex on 19 at the same day after 1 hour i taken i pill and i got again periods on 24 of this month so next month when i will get ? why it happen after taking i pill please help me from this situation am tensed there is any chance to get pregnancy please help me out mam eagerly waiting for your reply .it is a normal mode to bleed after taking i pill .after how many days i will get my periods suggest me