Re: Serious problem with DD. Need help :(
I pulled out my Ferber book. From what you describe it's either night terrors or agitated sleep walking. You have to let it run it's course with as little intervention as possible. Don't let her hurt herself, obviously. But don't try to wake her up otherwise stimulate her as it will only prolong the episode.
Ferber recommends against medication at such a young age, but isn't opposed to it for school aged or adolescents.
If you're not willing to go to a doctor, that's all you can do.