What’s your opinion 😬😅

So my fiancé and I aren’t actively trying to get pregnant since there’s a lot going on right now we wanted to wait. We have a 2 year old. Right now we just had sex and we agreed that he was gonna pull out but obviously we got caught up in the moment and as he was about to pull out he finished but yet he was in me. Now he said he was half way in when he ejaculated so since he wasn’t all the way in (yet nothing was on the sheets) as he was when we usually have sex that maybe that lowers the chance of getting pregnant. Also I checked the app right after and it says im on my fertile week and supposed to ovulate in 3 days (If the app is correct). Could he be right or it doesn’t matter that he wasn’t all the way in?