I have been suffering from migraines for years, I am 30. I have been told that my facial drooping, and stroke like symptoms that come and go to the right side of my body are all migraine linked. I also loose my taste. Without a headache at all this happens. It last from 1-6 days buy all CT scans are clear.
Your case seems to be of familial hemiplegic migraine in which recurrent headache episode associated with focal weakness occurs which improves also.  A CT scan may not be abnormal. Sometimes MRI show white matter lesions.  Treatment is prevention of migraine headache and evaluation for any other cause of stroke. May God help you in tackling problems.