labyrinthitis is one possibility; an inner ear infection that is really diagnosed by symptoms alone (the doctor cannot see your inner ear). you could be many many causes for your symptoms so consider getting a second opinion from a neurologist (because of the headache).
ear infection. occasionally i get vertigo followed by nausea then tremendous migraine. . when ever i see my ent he finds inner ear infection and always the same ear the right ear. i have had cats scan of my head and a special balance test. there is the name for it but i forgot it. the vertigo is so bad that everything spins around that leaves me sick for couple of days. what if anything should i do.