Sounds like labyrinthitis. My evil ex-boyfriend had that a few years ago. It tends to be a part of the flu, and probably isn't a result of taking the Miracle-Mineral-Supplement . He has an infection of the inner ear (the labyrinth) and it tends to make you dizzy and nauseous. If anything, you might want to try continuing with the Miracle-Mineral-Supplement to see if you can get rid of it.
If it is labyrinthitis, it takes about a month to clear up on it's own.