Sex drive is totally out the window.

So I am 6 weeks today, my husband has been wanting to have sex or something of that nature like we normally would on a regular basis. Well now that I am pregnant, I want nothing to do with it. I'm not in anyway aroused at all.. I feel bad because I don't want him to feel like I'm not attracted to him, but I don't know what to do. Anyone else feeling the same?? Please tell me I'm not alone, and any advice?