Has anyone heard of aromatherapy to treat dizziness and migraines? I saw somewhere that lavender or peppermint could be helpful and I’m thinking about trying that.

Never heard of it specifically for that, but both of those scents are great for calming oneself or relaxing. If they don’t set off your migraines (because remember, smells or scents can do that!), you may want to use them for meditation. One of the recommended techniques for dealing with MAV, etc is to calm oneself down, thus calming the central nervous system and thus, hopefully calming the brain, etc.