Donna can’t fall asleep. As she lies in bed, she can’t take her mind off the fear that she has a brain tumor. Even though her doctors reassure her that everything is fine, she can’t get past the fact that from time to time, it feels like there is something not quite right in her head. Sometimes she gets headaches for no reason. Sometimes she feels dizzy or lightheaded. What could be going on that modern medicine can’t explain? Surely, there must be something terribly wrong that the doctors can’t figure out.