Pregnant?

Lindsey

My boyfriend and I were getting a little hot and heavy a few days ago. We’ve never had sex before, so we were just messing around. He stuck it in, not even far enough for me to feel the whole tip. He took it out after 10 seconds maybe. It was two days before my ovulation. I took a Plan B within 24 hours. How high is the chance of me getting pregnant from precum?