Confused...

I was due in October so went back to my home town in England to have the baby also to be with my parents and sisters for support. I moved to US to be with my husband who has lived here his whole life. He came to get me and baby and to go back home. Yesterday he tried to get all intimate with me and we had sex first time after birth. I did not enjoy it at all and didn't even feel turned on by anything he was doing. I love him and he's the love of my life but anything intimate I just don't want to or feel like doing. He was a bit upset and said I don't love him. I spoke to him and said maybe it's because of the baby. Especially being busy all day and tired the last thing I want to have is sex. He didn't really speak to me properly after that. What can I do?