I have a friend, no, this is NOT hypothetical, and NOT about me, who
has a problem.

One morning, not too long ago, she woke up screaming, in some sort of
pain.
She was vague about it, but it was "somewhat like a bad headache, but
not a migraine."
She has had migraine headaches before, so she can distinguish, plus it
was missing migraine characteristics (I.E. Auras, sound disturbances,
long lasting effects, etc.)
She described the room spinning. She said that she was laying on her
side, and her view was actually spinning.
She also said that when she focused her eyes on something, she would
hallucinate, and see thing superimposed over what she was looking at.
This episode lasted about 10 min. through an hour.

Info about her:
She does not use drugs or drink alcohol.
She does drink about 2 liters of coffee every day. (I'm serious,
people!)

So what should I do? We're close friends, and both she and I want to
know what caused this, and how to prevent this.
She doesn't want to go to her doctor, but I don't want it to be
something serious, and her not know about it.

Can anyone help?

Thanks,
Angelico DS