birth control, semen in the wrong places?

Alright ladies, I need some help. 
I started birth control this past Wednesday, I understand that if you don't start it the first Sunday or whatever after your period you're not protected right away. Or for seven days is what I've heard. 
Well I've been sleeping with the same guy for the last couple months, we never use protection (stupid I know, I've heard it) we just had sex and he finished on my lower stomach, well when I was cleaning myself up it felt a lot wetter down there than if it were just me, without any more details....
pretty much all I'm asking is if it was him that was in that general area is there anyway I could get pregnant from that...? Just the fact semen was near or around close enough to get in? If that makes any sense. Or am I in the clear so to say? 

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