Regardless if it's migraine or seizure, you'll get relief when a diagnosis is made and treatment begun. Migraines, from what I've read, and experienced, are usually vascular constriction (which can produce effects like you experience, and as I experienced in the form of ocular migraines) followed by vascular dilation. It is my understanding that the dilation may cause the actual pain of migraine. Medications used to treat painful migraines may not be compatible with treating your condition, since the treatment of painful migraines often involves vasoconstrictive substances and may worsen the migraine symptoms that you (and I) have.
Migraine prophylaxis is the prevention of the migraine from occurring, it would involve taking medication on a daily basis rather than taking medication when the migraine begins. The interesting thing is that some of the medications used to prevent migraines are used to treat seizures as well. Individual response to medication varies, so a few different drugs may need to be tried until the correct one is found. My neurologist said that sometimes only a fine line separates the diagnosis of migraines from seizures.
Here is an example of various drugs that may be used to prevent migraines.www.aafp.org/afp/2006/0101/p72.html
Best of health to you.