No experience, but I'm wondering if being with Mom and Dad does calm her down ?
Try getting a twin bed, and when she wakes up, take turns climbing in her bed with her, and holding her. whatever is scaring her, obviously she needs some sense of protection and comfort. Would quiet music help? If you put something soothing on, bird sounds. whatever on a CD player, and climb into bed with her, maybe she will begin to associate the calming music with the comfort, and at a later date you would only need to use the music?
Meanwhile, if you don't want her in your bed, the best place is to climb into hers, and that won't work with a crib. Also,if you take turns, only one of you loses sleep per night.
I have this theory that kids know what they need, and they are good at letting us know, if we catch on. sometimes we as parents don't want to catch on, for whatever reason. But if you are able to deal with the problem, by meeting the needs, the behavior will change. So I would be sure to hold her so she feels safe, esp feeling safe in her own bed. Maybe with a special stuffed animal, like Winnie the Pooh or something. I like Pooh cuz the stories around Pooh are timeless and age appropriate in our otherwise crazy world. He's also gentle, cuddly and not terribly bright although always loveable and well-intentioned. He's easy to identify with, and he's a decent role model as cartoons go.
We have a 14 year old who never was diagnosed, but every once in a while would have such nightmares that she could never tell us what they were, but she'd show up in our room absolutely shaking. there's no way I could ever send her back to bed like that, so she would climb in with us, and we'd all sleep together. It wasn't a nightly thing, so it was easier on us, but imagine how horrible it must be for your daughter to be afraid to shut your eyes and sleep ?
I remember, my brother's oldest, when she was very young, used to go almost into a panic, and they thought perhaps she was reliving birth. ?? they used to put her in the snuggly carrier, and walk her around, and that worked for her. Your daughter is older than that now, but I would try to find what does provide comfort and use that until her panic subsides. Also, try to introduce a snuggly stuff animal to the group comfort hugs -- because as she grows up, it's much easier to take a stuffed animal to Grandma's house than to bring Mommy and Daddy whereever she goes. :-) My 14 yr old brings a stuffed animal to her friends' houses to sleepovers, as do most of her friends, and it's perfectly acceptable for girls. So the stuffed animal wouldn't ever be a sign to her friends that she is "a baby". :-) I even had one on my college bed ! And, yes, when I was lonely at night, 500 miles from home, I hugged it. :-)