Sorry you are having a bad patch. It should improve again. Mine always has. I’ve had some incredibly uncomfortable and vicious attacks, but my balance these days is almost as good as prior to this monster visiting. My recent relapses have been much milder and I haven’t had vertigo for a couple of months now. I’m about 2.5 years in.
Yes I can't help feeling that one day there will be better tests that are much more definitive.
Out of interest, except for popping, do you get any tinnitus?