Condom broke.... Help!

Okay so my and my boyfriend were having sex today and he came inside me, but we didn't realise the condom had broke until we had finished. I'm not on any birth control and I can't get a plan b because nowhere in my town does it and I can't drive to the next town over. I'm hoping that because my period is JUST ending (as in today is the last day of it) that there will be quite a low chance of pregnancy? What do you guys think?😰