Is this possible?!?!

On July 4th during my fertile window me and my finance had unprotected sex… I usually feel when he cums inside… this time that he claims he did I didn’t feel it at all. When I told him I didn’t feel him and that I think he got it out in time he said no he didn’t. So now we both feel crazy. Is it possible for him to have cum inside and I just didn’t feel it?