My husband wants nothing to do with me...

And it's getting old fast. We are hardly ever affectionate other than kissing. We haven't been intaminte in a while. The other day we started to fool around but as soon as I started to get into it he said he didn't feel well and completely stopped. He was just like this my last pregnancy. I'm only 6 weeks pregnant so it's not like I have a huge belly. I am a little over weight and I'm really beginning to be self conscious about myself. Now that he hasn't wanted anything to do with me it makes it worse. I don't know what to think right now. I don't think he's cheating but I don't know what else it could be. Maybe he just isn't into me anymore.