While I am pregnant or breastfeeding, I go completely off sex. All I can suggest is to talk openly with your partner, and maybe get him to come on belly belly so that he can see that this is normal and that it doesn't actually have anything to do with him.

My first pg, my DH really struggled with this. we had some big conflicts and ALOT of tears from me. by now (3rd pg) my DH is 'used ' to it. he knows that it isn't because of him, that it is just the hormones doing stupid things. he is realistic in accepting that while I am pg sex will be few and far between.

On my part, I have tried to be more intimate in other ways. And if there is even the slightest inkling that sex isn't completely out of the question (ie, the thought of it doesn't make you want to hurl) - I jump at it, even if i'm not actually 'in the mood' (sometimes I have to warn him to be quick, before the mood passes). Even then it can be a month or two between DTD.

Also if you don't mind 'other' pursuits, there are other things you can do which don't actually involve sex. Personally if I am turned of sex, that means everything - but if not there are other ways to have fun - IYKWIM.