Well sir, I'm hoping its an inner ear thing as you say or something that will pass shortly. Maybe some ear drops, a few pints and good as gold! Couple of other potentials.....polarized sun glasses can mess with a fella, and if you wear prescription glasses, I've heard of folks getting out of whack if their prescription is outdated. Now this one is a stretch but some people hold their breath while concentrating in sports or anything that requires a higher level of concentration causing light headedness.
Whatever it may be.....we're all pulling for a quick and easy remedy!