~fingers crossed~

I just need a little advice !!! 
Me and my boyfriend had some passionate love yesterday and well the day before that too! But we had kind of an accident but it's not really an accident if we did it on purpose right ? Anyways let me Just get to it (he nutted in me) I would love to have kids!!! Especially with him what's the chance of me getting pregnant on my fertile days ? Which was those days ?