Hi, I had sex with my girlfriend yesterday. I wore a condom, but during sex, we stopped because we thought we heard someone coming. Then my penis had become soft. Then when we decided to go again, my penis got hard again. I forgot to change the condom. Is that bad? I'm worried that pre-cum had gotten out. When I ejaculated I pulled out. I just want to know what are the chances of pregnancy and am I over-reacting?