My period was due on 6th, I took 5mg regestrone on 3rd and 4th and 15mg on 5th, 6th, 7th and 8th and again 5mg on 9th. Me and my boyfriend spent the 8th night together. There was genital s rubbing. And just for a while his penis was on my vaginal opening. He wasnt wearing condom. And no ejaculation also happened. Just to be sure, I took unwanted 72 within 12 hours. But its 13th today and my periods have yet not arrived. Is it because of regestrone? If yes till when can I expect it?