Hi M 27 Years Old Nd I Had Last Period

Hi m 27 years old Nd I had last period on 30th of July Nd on 1 of August I come sexual contact with my parter as we use condom but it may tear off during tht period Nd I too take( I pills 72 contraceptive )on same day after 2 hours but till now my periods will not cm Nd m worried abt is this chances of pregnancy