E.g. Multiple Sclerosis can very well fit what you're describing, too. Commonly, there's a flare-up (we commonly use the term "attack" funilly enough)of some neurological symptoms (numb limbs, tingliness, diziness, vision issues are very common) that can last a few days/weeks and then mostly or completely subsides (until the next time).
Absolutely not suggesting that's what it was, just that it is what it could be too (or many other things — auto-immune diseases in particular can be really broad and nasty).
Sushi, I'm so glad you're doing better. Some of what you said (including just writing about it for awareness and sharing) resonates with my MS experience. I'm sorry you've experienced this and I hope things will keep looking up! <3
And yes, at one point, the doctors said I almost certainly had MS. For exactly the reasons you stated: my symptoms were consistent with it. It was only when the antibody in my cerebral spinal fluid came back positive that my diagnosis shifted to anti-NMDA receptor encephalitis for certain. Prior to that, I already had a follow-up scheduled with an MS specialist. I'm guessing that was done because of how rare anti-NMDA receptor encephalitis is.
So it's great that with anti-NMDA there is an actual singular test to determine this, but given it's so rare and little-known, getting to that point is very much not given :-(.
Trouble swallowing, jaw pain, dizziness, double vision (and more) were all things I experienced as well. At one point, my left eye was dropping significantly.
Not to say you had or have what I have. The symptoms are very non-specific.