Can migraine cause hoarseness? is it likely that a physician will rec revocation of license due to frequent/unmanaged migraines? (blkout/vision loss)

Migraine: It is unlikely for "migraine" to cause change in voice. They are unrelated. If your "frequent / unmanaged migraines" are disabling, which they are based on your report of blackouts, you are a danger to yourself and others. I don't see how a doctor would not recommend revocation of your driver's license. You should absolutely never get behind the wheel of a car until your condition is controlled.