Birth control help

Grace
Okay so I am on birth control but I take it at different times. Like the night before last night I took it at 7 last night I took it at 9:30. Does this have An effect on if you get pregnant ? I was supposed to start my period today and my boyfriend and I had sex last night, I have not yet gotten my period . We did not use a condom because of the birth control pill, I looked it up to see if I could still get pregnant on the pill but not everything is true. So thoughts from you guys ?