I had what I thought was BPPV as I would get severe vertigo whenever I would roll over in bed. I did a home remedy which involved lying on my back with my back and head lower than my legs and then move my head in different ways. It worked instantly.
I had this occur for two years in a row for a couple weeks each. It was mostly just rolling over in bed and having to stand very slowly and cautiously in the morning.
It seemed to happen when there was warm weather in July. But after those two occurrences it never recurred.
Very disturbing and puzzling.
Reading about it on the internet, I read about some kind of crystals in the inner ear that get displaced, and prevent the fluids in the inner ear from moving around like they need to do to keep your equilibrium.
I bought some ear wash with a syringe at the drug store and blasted some nasty stuff out of my ear, and within a couple days my problem went away.