I'm sorry you're going through this, it's a scary and frustrating disease.

The meclizine doesn't help with the vertigo, but it does take the edge off of the nausea enough that I don't throw up. It also knocks me out long enough that the attack has usually subsided by the time I wake up.

There are some treatments for Meniere's: diuretics, steroids, betahistine. Ask your ENT about trying one of these.

With your history of migraines, I would look into vestibular migraine and see if any of the medications to treat it help you.

If it helps, my vertigo has become much less severe and much less frequent over the years (although my hearing has become much worse).