I am writing a story about a girl who travels to another world when she sleeps on earth, and travels back to earth when sleeping in the other world. Her mind never sleeps. When she is asleep on either world, her mind is nearly empty and her body rests, but her mind doesn't rest and doesn't need to.
While on the other planet, she is executed. This leaves her brain-dead on earth for about 2 hours, but her heart and other functions remain. She has a nightmare, of sorts, in which she finds her own dead body from the other world on the ground. It terrifies her. When she eventually wakes up (after two hours), she has a terrible phobia of sleeping.
Her mind is generally fine for 3 weeks, save the trauma of the murder; but her body is no longer resting.
In this case, what clinical side effects could be expected during this 3-week insomnia period?
Again, it is only her body which required sleep.
The effects also don't have to be 100% realistic, but should manifest physically so the doctors would see them, and recommend sleep. The conditions will kill her after 3 weeks (this is the crisis).
What reasonable diagnoses would be offered?