If you are more dizzy when you stand up per se you might suffer of orthostatic hypotension that might be a symptom of adrenal insuffuciency. In that case you might want to talk to your doctor.
If the dizzyness appear more with head rotation and always on the same side it can be either cervical (from the neck) or from an otholith (little stone in the ear canal.)Either way a good chiropractor could very be helpful.
I do not think it is the gse...but if you keep feeling dizzy you might want to stop for a few days to see how your body reacts.