I wish I lived closer so I could give you a hand. You sound very isolated.

You need to rest in the day and not worry about housework.. Take care of yourself. You don't want to end up sick from exhaustion...I've been there and it's awful.

Eta: your poor dd. Hope she gets better soon. If she's unwell it's likely dd2 is getting it. My dd was awake every 30 mins for 2 nights when sick last week. Hang in there hun