my 20 year old daughter (we think) suffers from migraine but without headache - has a aura to start then shes feels foggy in head, disorientation, dizzy, nausea, lack of concentration and very tight feeling in brain. She had an attack earlier this year - had to go to bed for a week. Two months ago she had another which has wont go away (it has been quite mild up to now. She now feels a feeling of seasickness, nausea, forgetfulness, feeling unwell, tired after a good nights sleep. She hasn't knocked her head ever. She is a normally perfectly healthy girl.
What could it be?