Are severely impaired vision and auditory hallucinations common in migraines? this is n like looking through black film

Vision changes: Vision changes are commonly associated with migraine headaches, but auditory hallucinations are not. See your neurologist for a full evaluation. If your hallucinations persist without being associated with the headache, you can be referred to a psychiatrist. Keep a detailed headache log (timing, duration, symptoms, frequency) to your neurologist. http://www.nlm.nih.gov/medlineplus/migraine.html

Yes and no: Visual obscuration is common in migraines, but not auditory hallucinations. Your med history says "convulsions." Does this mean epilepsy? If so, why are you not on a seizure med? If your auditory hall's are stereotyped (always the same), they could be nonconvulsive seizures. If your headaches come AFTER the hallucinations, they may be post-ictal headaches, not migraines. See a neurologist.