I have had vertigo (and ear issues) for most of my life, but the spells became frequent and very severe about 14 years ago. There were times when I was afraid to move or open my eyes for hours at a time. I was seen by an ENT at a Dizzy & Balance Center and was diagnosed with BPPV. When I first learned the maneuvers, I was instructed to do them 3 times daily until I was vertigo-free for seven days. What I didn't expect was that it was MONTHS before I would go seven days without an attack of BPPV. We finally determined it was because I had it in both ears.
Now I have attacks infrequently (and always in my left ear), and if I pay attention, I know when they are coming because the tinnitus in my ear changes from a clear high-pitched constant tone to sounding like a loud bell tone a day or two before. If I start the exercises right away and can often avoid a full-fledged attack. At worst it is more mild and I can continue to function while doing the exercises 3X a day.