Don't put too much pressure on yourself. You are growing a new little person and for many women this is the toughest, most tiring, part. If your daughter has day sleeps then don't worry about the housework and just sleep during these. Try and eat small meals (dry biscuits or crackers if nothing else will stay down) and have regular sips of water so that you are staying hydrated if you do vomit. And if you need to use the TV to babysit DD whilst you rest then so be it. Is there a friend you could let in on the secret so you can have some help?