H.H.
Goodness me, I can't begin to imagine what you're going through. When I was put on bed rest for pre-term labor I found a great web site called Keep Em Cooking - http://www.keepemcookin.com
I have no other children and so I don't know how to advise you, but on this site there are so many women who are in the same boat as you are. I bet they'd have so much advise to offer.
Take care and all the best with you new precious bundle.