So long story short I am usually always over paranoid when it comes to the possibility of getting someone pregnant even though I always use a condom.

The other night I had sex with this girl I have been seeing for a few dates now - used a condom and so no worries there, 2-3 minutes after I finished she told me she wanted to keep going, so I grabbed my last condom and began to roll it on, except I realized it wasn’t rolling down because I put it on backwards (it was dark and hard to see). I flipped it to the correct side and began rolling it on correctly. I entered her for a few minutes and stopped.

My concern is if there was any cum from the first time on my penis that it potentially got on the second condom I tried putting on incorrectly that I then had to flip. I assume it was decently clean after taking off the first condom but I really don’t remember much plus it was dark. What do you think the chances are someone would get pregnant that way?