Oh yeah, it’s the ear. When I was in high school I got a case of the flu that somehow affected my ears to where I had no sense of direction at all. I was home alone, and had to get to the restroom by myself. Falling out of the bed wasn’t too hard but I discovered I couldn’t even crawl without falling over, unless I leaned against a wall and moved carefully. Not fun at all.
I fall against the wall (or over furniture) if I turn too fast. CFIDS often gives one balance problems, but it has more to do with the central nervous system, than anything else. I’m used to that. This was new.
Now I know. Life is still good! (Or will be, when my head stays put.)