I really empathize with her description of severe "vertigo." Of all the ME symptoms I've known, constant relentless "vertigo" has been the worst (but, then again, I've never been totally bedridden with the exhaustion of ME, just pretty much housebound by it at times). In my experience, there is nothing you can do to temper this kind of "vertigo."*
Strictly speaking, what she has described elsewhere - and what I've known - is a form of "dizziness;" a sensation that the body is constantly bobbing to-and-fro. "Vertigo," on the other hand, is a sensation that the room is spinning - like you might get after spinning in place. The form I've known produces some interesting visual effects, though, such as corridors and walls appearing tilted despite that fact that you're standing straight up. Some PWME's might experience true spinning vertigo, however. It might well depend on what part of the inner ear is affected (assuming that that's where false signals originate).
Needless to say, the constant sensation of losing your balance keeps you on edge. It's something the body/nervous system never acclimates to. It's too primal, I guess.
*[I did find one thing that sort of took the edge off - lying on a bench swing and letting it drift back and forth. It didn't help the "vertigo," but it gave it an acceptable "context," i.e. that you should feel motion while lying on a moving bench swing.]