My daughter gets grey spots in front of her vision, then she gets an awful migraine, and the grey spot carries on (Only in one eye though). After about an hour, she is sick. Then the spot disappears. During this 1 hour period, she is very sensitive to light, sound, and change in temperatures, she doesn't like the coolness of a flannel on her. Also, she is very weak and sleeps a lot. Do you know what this is, if so, please help!