Dizziness sucks! I get these periods where I feel really dizzy. It gets several orders of magnitude worse when I hold my head is certain positions. The doctor has explained that it is caused by crystals in my inner ear. The crystals come loose and float around in the canal that facilitates balance, that whole bubble in the spirally tube thing, remember. Anyway, a crystal gets lodged and blocks the flow of the fluid. When the pressure builds up, the crystal comes loose and the fluid floods the section of the canal that was blocked. The brain translates this as spinning. Makes me feel really sick.
I hate it when I feel like this. I hope it goes away soon.