I recommend a great book called "Dad's pregnant too" It is non-patronising, but really explains things to men about whats really going on and points out how they can make things better or worse. If he won't read the book, he can get a weekly email from the website. My DH still comes up and asks me about stuff he's read about.

He really does need to man up and accept things have changed. You may have a great 2nd and 3rd trimester or you may hit other, harder complications (fx you don't). I've recently developed SPD, so now have difficulty walking, getting up and down stairs, getting in and out of chairs/bed/car etc without a lot of pain. If my DH wasn't supporting me through this both physically and emotionally I'd be stuffed (and so would our marriage).

GL