Conceivably you could have a migraine with dizziness as the _only_ symptom. But dizziness can be caused by other factors. Could you possibly have
benign positional vertigo?
You didn't ask, but it's time you saw a doctor. Your condition is potentially dangerous; even if the cause is potentially benign, you could be injured during a spell. And also recurrent dizziness is also a possible symptom of heart problems, low blood pressure, and other conditions that are better off diagnosed (or ruled out) as soon as possible.