Withdrawal and pregnant

So I realize how silly this post may seem. As I wasn't really charting and my husband was pulling out. But he's really good at pulling out! Like always out 10-30 seconds before he ejaculates. I do think I was ovulating the last time we DTD, but I don't have much CM anymore and lately I think ovulation has happened earlier than my norm. I'm more than ok with another child, but he has always said we're done. How the hell do it tell him I've ended up pregnant?!