My 15 year old daughter has been getting constant non stop headaches for 3 weeks, top of her head. This includes dizziness, nausea , ringing in her right ear, clammy hands, pressure in her head. One doctor said it was migraines and have her triptan, that did not work. The next day she went to emergency room and they hooked her up to an IV for migraines, that did not work. Another doc said it was a sinus infection.....she has no cold at all. No doc knows what it is. Could you please help?