You might want to get checked for some kind of vertigo induced seizures. I've had something similar, though the trigger was stress. Yes, I stressed myself into a seizure. But, the lightheaded, about to pass out feeling is what I had, though it also felt like a tingling sensation all over my scalp. Petit mal seizures, quit the meds I was on and not a problem.
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Every time you think you've made it idiot proof, someone comes along and invents a better idiot.
?the end of our exploring, will be to arrive where we started, and know the place for the first time. - T.S. Eliot