DH is on my last nerve

I know it's not just me, but my DH is seriously going to make me have this angel earlier then expected lol. His attitude sucks, he doesn't talk to me like he used to. It's almost as if he just doesn't want to be around me anymore. I know I can be a bit emotional, but IM PREGNANT lol. 
This is his first, my second 
Any suggestions on how to talk to him without making it an argument ?