Getting so irritated with hubby!!!

So I am 13 weeks pregnant and it feels like we have just turned into roommates we don't have sex anymore hell we don't even sleep in the same bed!?!?! I have tried talking to him and seeing if I have done something but he just shuts down and says he has no idea what I'm talking about. Is this just because I am pregnant or are we headed for some serious coming to Jesus talks!!!!