First off, I am in my 20's and came from a very religious family, so I know little to nothing about sex. My boyfriend and I had sex for our first time. I'm a little nervous because I don't know too much about how all this works. We were careful, he didn't finish inside of me, and we filled the condom with water to make sure it wasn't broken afterwards and I even took the plan b pill.  Well we got into the moment and had sex again this morning, same situation with the condom. I was on my 2nd to last day of my fertile window. Is this anything to worry about?