Nerd gets me pregnant...!

My brother's boyfriend was visiting and stayed the night. When I was getting ready in the bath the next morning, he just popped in. He immediately blushed at the sight of me, because I was only wearing a bathrobe that I hadn't fastened. He wanted to leave immediately and apologised, but when I saw his bulging pipe in his trousers I pulled him back and showed him how to use such a hot cock properly. When I started with blowjobs he was almost cuming....but in the doggy position it was all too late... He fucked me so full of excitement that he squirted all his cum into me.... SHIT! And yet I've been off the pill for weeks.... Am I pregnant now from this stupid nerd???! It can't be that?!!!