My Daughter Is 19 Years Old, And For The Last

My daughter is 19 years old, and for the last 10 months these are her symptoms: during her incidents wich occurs on a unregular basis, this is what happens: stabbing pain behind the eyes and fainting at the same time, followed immediately by strong pain in the eye area and convulsion where she passes out. She just had an incident at school, was brought to hospital by ambulance, and is now back home...no answer as to what it is. Epilepsie has been rooled out, also tumor (she has ad eeg, MRI et had a fes test for her heart. The specialist and her family doctor do not know what is wrong with her.