Last night, Sunday feb. 8 my boyfriend and I had sex. I was on my period and it was pretty light so we decided to have sex. He used a condom like always but when he pulled out because he was getting ready to ejaculate.. We noticed that the condom broke. So he didn't cum inside of me but I'm worried about the precut. So immediately I went to Walgreens and bought the plan B pill and took it. What are the chances of me getting pregnant? Also my period this morning was super light and barely existent.