Not his first

So I'm somewhat sad because I expect him to be as excited as I am..but I have to realize this isn't his first or even his second. He has a 7 and 9 year old boy and girl. I just can't help but feel that he would be more excited or more caring if this was his first. Instead he is pointing out all the little stuff I'm doing to not make this work like getting mad and not talking to him. The doc thinks I may miscarry so I don't want to stress out over what I consider his insignificant feelings. This is about me right? I just want to feel like I'm the world to him like I'm sure he made his first wife feel. :( these hormones suck!!!