And, I'm only speaking as one who has a relative w/this issue... have you seen an 'audiologist'? EAR GUY. Why? could be some sort of inner-ear issue.
Just a thought, but usually many types of motion set off the whole of your state of where you are in relation to the rest of the world.
IF you have a severe inner-ear problem? You'd likely be sick as a dog and nauseous all the time untill the ear nerves died.
Worth a try... Good luck! 's - j