I have those strange feelings as well occasionally, though thankfully it is only very occasionally.
I had labyrinthitis a few years ago, was diabolical for the first few days, had to lie flat and couldn't change position at all without throwing up violently. I have never known anything like it.
The strange feeling is a bit like how I felt when I was on the mend from the labyrinthitis - a bit woozy, off-balance, kind-of-drunk in your body but not in your head. I can still get that feeling a bit now if I am somewhere that over-loads the senses - like a very busy shop (Primark, for example).
I have occasionally had episodes of feeling like this while at my desk at work but it only lasts a few minutes. Horrible feeling

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