I and my gf is initiated un protected sex. 10 to 15 seconds into it I thought it is not a good idea and withdrew. I was nowhere close to ejaculation. I did not ejaculate outside as well. We panicked and my gf took plan b one step after 15 hrs. Now, she is it expecting her period 3 weeks from the day of sex. We are very very worried and vow to never do this mistake again. What are the chances of she getting pregnant. I had also owed several times that day before the sex and I also do think I had precum. We are praying right now.