Unprotected sex...

So I had unprotected sex on the 30th of November and I had just got off of my period on the 26th. He pulled out so I wasn’t too worried but I am still worried that there may be a chance I may be pregnant. I know the chances are very slim to get pregnant on Precum, but I still have my doubts. Any help...I’m expected to get my cycle in 8 days, which will be on December 21st.