condom almost slipped off

So my bf and I had sex the day after I ovulated. We are very safe and we used a condom and he doesn't cum inside me. So while I was on top, we kept going and then he told me to stop for one second. He hadn't cum yet but he said he felt the condom was slipping alittle. He fixed it and then we kept going. Before he was about to cum he pulled out of me and came into the comdom. I was just wondering, could I still have a possibility of getting pregnant. Even though it was after I ovulated and we used protection should I be worried