please, go to the doctor, this could be anything from a nuritional deficiency to a brain tumor.... it sound pretty serious to me and i would be in to the doctor's as soon as possible...
you don't fool around about getting to the doctor when you have dizzy spells, those are Very serious and should be treated as such... also... dizziness can lead to feelings of falling and loss of visison and i wouldn't want that to happen to you while you're driving your car... you could kill yourself and someone else if you got into a car accident when this was happening...
please please go see a doctor
and let us know how you are feeling....
sweetpea