Your family's top priority, as I see it, is to keep you as healthy in every way as possible and to have the strongest sense of family as you come closer to having your second child. Perhaps your parents could speak to your husband about your needs at this time and ask him to put his ideas for granddaughter/grandparent bonding on the back burner for a while.
Now is a time to be close to one another, not to be arguing. Send me a quick note after your healthy baby is born. I'll be keeping a good thought for you.