D..
You're doing too much. She is depending on you and all the things you do for her, so now she HAS to wake up to get you to come feed her anxiety.
I would NOT have music playing all night long. That keeps her brain going. Stop making sleep such a huge issue. Deep breathing takes THINKING. She needs to be bored enough to fall asleep. Give her a boring book, maybe a youth book about world history or something (sorry, that works for me - lots of dates and places and I'm out!) Tell her that if she wakes up, she can read this book. Have a low watt lamp beside the bed that has JUST enough light to read by, but isn't a big deal if she falls asleep with it on. Don't sit in there with her. Tell her that you're very, very tired and she needs to do this by herself.
Hope you're both getting some sleep soon.
Dawn