Hug hug. I used to have 美尼尔 too. it was aweful, though

mine wasn't nearly as bad as yours. I never took any medicine, just lie down, do nothing and try not to study too hard (it happend before major exams for me).

Last year I had some other aweful problem which caused me to not be able to sleep on my own for 2 months, I was physically and mentally exhausted, but at least 美尼尔 didn't happen during that time. So at least for me, it is not related to sleep. Not sure this is any help, just hope you can find your root cause so you can avoid it.