bohinkle: This could be many things. It could be vertigo, Meniere's disease, seizures,
hormone problems, to name a few. The first thing I'd do is get an appt. with an ENT to find out about the Meniere's. Then I'd go see a neurologist and get an MRI, and possibly and EEG, to check out what's going on in the brain. You could even have an aneurysm and this could make you dizzy. It's nothing to fool with. Be careful if you're driving.
Keep track of these episodes on a calendar and see if they coincide with your monthly cycles and the full moon cycles too.
I hope it's not the beginning of what I developed at menopause. I ended up with epileptic seizures from estrogen dominance. Don't dismiss the hormones. Get those tested if you can. Good Luck.