Me and my girlfriend had sex on Tuesday. I had put the condom on inside out the first time, and it /may/ have been exposed to pre-ejaculate. My penis was in my pants prior to this incident. It was only out and not against my underwear for maybe 20 seconds.
I had masturbated that morning,
I had urinated twice during that day.
So should I be worried about a pregnancy? This was two days after her period.