Kel first of all big hugs honey I know you're having such a hard run at the moment
When she's crying at night do you get the feeling its because something's wrong (eg she's in pain?) or is it more like she's overtired?
How does she sleep during the day? does she sleep in the same place that you sleep at night? does she need to be held or rocked or in the sling to sleep during the day?
Are there any baby sleep books you've read that didn't work so we don't suggest things you've already tried?