Welcome to health care magic . As you have been suffering from these migraines and you have had a stroke
like attack in the past you should get a MRI
along with a blood check to see your lipid profile
along with a carotid doppler ( ultrasound
) of your carotid vessels in the neck . This is useful investigating a condition like yours . If the lipids
are high then you can be put on medication to decrease this so this decreases the risk of a stroke as well .
I wish you all the best .