My husband doesn’t seem interested

So I’m 10 weeks pregnant, I had an ultrasound today and the tech printed me a bunch of pictures. I was really excited. I showed my husband when he got home and he just seems so disinterested. He has two kids from his previous marriage so I get this isn’t new to him, but it’s my first child and I’m really excited. He seemed excited at first and couldn’t wait to tell his kids, but now this. I told him I feel this way and he told me I’m crazy. Has anyone else experienced this? I’m feeling crushed right now. Is my husband just a jerk? I’m so confused.