J.B.
Yes. My 4th child is evidence of this. Use backup birth control for a while. I forget how long you need to use back up. When I got pregnant, I had taken it in the afternoon instead of the morning on a Wednesday and Thursday and was back to the morning on Friday. My husband and I got together Friday night and from that hook up, I got pregnant. So two days of being a few hours off was enough to throw my body out of whack and trigger ovulation, but I'm ridiculously fertile.
Just read your package insert and follow what it says, but please know that they're not kidding when they say take it every day at the same time. There is no wiggle room.