Husband and Sex...

Hi...This is my first child/pregnancy with my husband, I'm 6w3d...I have kids from my previous marriage and he has one from his... we've never talked about sex from past pregnancies but he hasn't wanted to have sex with me since we found out...I asked him why and he just said, it's because I'm so tired now he doesn't want to bother me with it...we talked a bit more about it but still nothing...should I just jump his bones or give him space? I don't wanna make him uncomfortable but, I miss my husband if u know what I mean, lol!