Does he seem like he’s trying to “accidentally” get me pregnant

My fiancé claims he doesn’t want another baby right now.. he says he wants to wait until after the wedding later this year but if we “slip up” he’s completely ok with that and will probably want to push the wedding date up.

Im not on birth control for a number of personal reasons so I don’t need to hear “why aren’t you on bc”

Anyways during sex he mumbled something about accidentally getting me pregnant and then finished in me.

Anytime I try to communicate with him about if we’re trying for a baby right now or not he tells me we should wait but then he goes and finishes in me I’m so confused. Like I said I’m fine either way I’d just prefer open communication about it. Advice?