What's the chances of me being pregnant?

Me and my boyfriend had sex on Christmas <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> and didn't use protection. He finished inside me and it was a 3% chance of pregnancy. Is there a high or low chance I'm pregnant? I feel nasous but it could be from being nervous that I am pregnant.