question: my granddaughter is 15 and in the last few months has had episodes of suddenly getting chills, then overly warm, her eyes gloss over, she says her vision is gone. She snaps out of it after a couple minutes but this event has happened 4 times. Just tonite at a concert she went blank and had to be taken from the choir. She has had blood work done and has be told she has vasovagal, but these incidents happen close to her period. Is there any possibility of a hormone problem?