It’s extremely late for this answer but, for those who need clarity I suspect her migraines are extremely intense. Migraines are related to seizures, except there’s no real loss of bodily function or control, usually just pain, weakness and sometimes nausea. This is closely related to stress, and no matter the trigger(s), the intensity of the pain can snowball that stress into a stronger response. Identify the main triggers, and avoid them, and develop a stress coping method that will be perfect therapy not only in general, but to prevent and minimize future headaches.