He is acting different :(

Ricci
So for about a week now I have noticed that my SO has been distant. I am 12 weeks pregnant and our baby was planned. Before I got pregnant he was so excited about us having a baby and talked about it all the time and now that I'm pregnant it doesn't seem like he is excited anymore. He never wants to talk about it or look at baby stuff with me. He has a lil boy already that's about 18m. I dunno what's wrong but it makes me very sad :(. He doesn't want to cuddle with me anymore like we used to. Things just feel different. Has anyone else experienced this? Is it me overreacting because of my horemones? #feelinglost