So scared. Please help.

So sorry for the TMI but I need help. So I had sex with my boyfriend on Valentine’s day. Everything was good until we switched positions and I realized the condom had completely broken. He did not finish inside me, however there was a lot of precum there. I am on the pill, but I did not take it consistently since my period started 2 days earlier than it does. I took a Plan B like 2 hours after we had sex. What are the actual odds that I’m pregnant?