Attraction infraction..

So whenever I turn down my husband for sex, which has been a lot lately he gets upset. Which is understandable. I’m 8 weeks pregnant and tired as hell all the time. He thinks I’m not attracted to him even though I am! I just have no libido!! So then he gets all pouty and distant and a fight ensues. I don’t know what to do besides give in and have sex but I never start it and it takes me a while to get into it. Is there something wrong with me?? Help!! ☹️