Of course she would be disoriented if you wake her up, but that doesn't matter. Wake her up as late as possible, whenever you go to bed. Ideally, around 11 o'clock. Just pick her up and tell her it is time for a pee. Carry her to the bathroom and put her on the toilet. Put the water on so she can hear it running, and sit in front of her to support her so she doesn't fall off. Keep saying to her that it is time for a pee. Even if she is very sleepy, she'll be able to hear you, and if you wait for a couple of minutes, it will happen.
Once her bladder is totally empty, she should be able to sleep through the rest of the night without an accident.
Then, you do the same thing first thing in the morning, as early as possible.
I used this method when my daughter was 2 1/2 and refused to wear diapers at night, even though she wasn't potty trained, and it worked brilliantly! I think she only had a couple of accidents, and that was that!
Eventually, I was able to stop waking her, and she held it through the night, but it takes a while, because you are dealing with habit.
If this doesn't work, you might consider using homeopathy for the problem. I can do consultations via email, if you are interested. You'll find my info in my profile.