my daughter is 14, has a shunt but no revisions. never had an issue. she is not nauseated, no head ache when she looks up or down etdc...but she is lightheaded sporadically today, said her head feels fuzzy. she almost fell in shower she said. Her vision is blurry off to the sides, and her feet has a little tingling. I was thinking migraine or low blood sugar. gave her fruit juice and hard candy. any thoughts. other than this she is healthy (has cerebral palsy, mild depligia)