so my bf nutted in me...

So my period was already late, but my periods are very irregular, or used to be but the last two months they've been off, and mine still hadn't come, yesterday we were doing the dirty, and we weren't using a condom, well he then pulled out, and said that he didn't pull out on time, but most of it was on the sheet and on him, he said he didn't cum a lot, so what does that mean, can u still get pregnant even if ur period is late?