fair fighting

My husband and I got into the biggest fight of our marriage. We've been together for five years, one child, one being born in just a few days. Marriage is HARD. And I'm a sensitive person as is. He told me (four days before delivery) during the fight he didn't want to be with me. Later he said he didn't mean it, wish he could take it back and is crazy about me. But I can't get the words out of my mind. I'm curious, if you don't mind sharing... What is the worst thing your spouse has said to you, or vice versa. How did you overcome that?