Freaked out husband

What did you do or say to help your husbands through? We’ve talked about children and talked about starting a family and always say things when we have kids. When I’m pregnant, etc. now that o found out I’m actually pregnant, he’s completely freaking out and I feel like I can’t even bring anything related to the topic to him. I know he’s scared and nervous and guys react different the girls. I just want to know what to say to help hom through it and get him to the level of excitement. Please help