What are the odds? (Not sure where to post!)

Okay so this morning around 2:30 am I was in the middle of intercourse and he pulled out thinking he was about to, then he stuck it back in and we continued a little more. He pulled out a second time and he actually did cum the second time. What are the odds of him doing it the first time he pulled out? Like isn’t he supposed to feel if he did or not? He wants me to take the day after pill. But I don’t. I do not believe in it. I honestly don’t think he did the first time but he thinks he might. He knows my opinion on the pill. But should I tell him that I need to test before just to make sure that it’s not a possibility already from a couple weeks ago? I’m so nervous right now. I have been shaking since he left this morning. Any advice?