My mother-in-law is having problems with vertigo, too. The problem started the end of October. Since she is never sure when this is going to happen, she is no longer driving. Her doctor prescribed a medication, but it doesn't seem to be helping. My husband went to GNC and asked them about it. He bought her (sorry, I forgot the name) a liquid that is chocolate in flavor. She puts that in a glass of milk and drinks it. This has helped more than anything, but the problem still exists. She is going for an MRI on Friday. It is good to have some testing done to rule out another problem.
Try not to worry. This seems to be a pretty common problem that sometimes just works itself out.