Help!! I need advice

Okay so my boyfriend and I had sex the other night and I was a day away from my prime ovulation day and we were having inter course, and the condom got stuck inside of me when he pulled out before he came. He said he felt it come off so he didn't cum inside of me, but he knows I suffer from severe anxiety so I feel like he could just be saying that to calm my nerves. I haven't began the pill yet. Is itt possible that I could still be pregnant from the condom being inside of my vagina?