Last month my period date was 6th feb and due to ocassion i had to delay it

So i had a pill to delay period on 5th

I had that same pill on 6 7 n 8th after i stopped having that pill i had my period continuously from 9th to 13th. Then i had an unprotected sex on 18th feb nand within 72 hours i took ipill. And its 13th march today and still i got no period. Is it because of ipill or is there any chance of getting pregnant ?. Pls help