Falling out

Ashley
My husband and I are TTC our third child, every time we have sex his cum will fall out of me. Either when he pulls out after finishing or when I stand up to go pee and clean up. Is it still possible to get pregnant? He does stay inside for about a minute or so after he finishes and then it takes me about another minute to finally get up.
I just feel like something isn't right as it only took us a month to get pregnant with our first and twice to get pregnant with our second.