If your daughter's DP began when she started having sleep terrors and debilitating sleep paralysis, there is a good possibility that she is having treatable "hiccups" of the brain during sleep called complex partial seizures. Most people arent aware of it, but sleep paralysis is part of this syndrome. See if you can get a referral to a neuroligist to do an overnight EEG on your daughter. Its a kind of sleep study. While they are at it, they can also watch her during the test for sleep apnea, which also gives alot of your daughter's symptoms of abrupt awakening. I know what I'm talking about - my DP and DR began as a teenager with sleepwalking and night terrors, and it was related to complex partial seizures. These arent things that are serious, but lucky for your daughter, once they are treated, her symptoms will be greatly alleviated.
Peace
Homeskooled
Peace
Homeskooled