@Erinmfs– Good morning. I get vertigo and it's just plain awful. Given your myasthenia gravis and maybe aqueduct stenosis I'm not surprised that it may have ignited your immune system to kick up some symptoms of MG that you might not have experienced before. We tend to think that just ears have something to do with being off-balance or dizzy but eyes have a big part in it too, that part is all connected.
Or, maybe you moved suddenly and have disrupted some calcium crystals that have built up in your ears and are now in the wrong place. Have you heard of the Epley Maneuver? It might help.
Have you contacted your doctor with this complaint? I would if I were you before you try the Epley exercises.
I hope that you have reported all symptoms to vsafe.cdc.gov.?