Sorry to hear about your daughter. Sharp learning curve all round!
But I just wanted to say, dont forget about you in the midst of all the chaos and changes needed. As well as looking after your little one's D, and looking after all of them as kids, you also need to allow yourself time to grieve for what might have been. Can't find it right now, but there several posts that Trophywench has mentioned the 5 (?) stages of grief - do a search - and allow yourself time to work through your feelings. Because otherwise, it'll hit you like a ton of bricks (and with little kids to look after, a ton of bricks is the last thing you need).