Can you get pregnant from only precum?

I lost my virginity yesterday night. He didn't cum at all because we decided to stop and take it slow. There was defiantly penetration though. He did not use a condom and I'm not on birth control. There was lots of precum though. I did research and it says that it is possible for there to be living sperm in precum. It says it's not likely but it is possible for it to result in a pregnancy. I am still really scared and no where ready to have a baby. I plan on taking plan b if I have to. Please share your experiences and opinions. Thank you very much.