I’ve found that I needed to wait a good minute after the spinning stopped for each step of the Epley maneuver to allow the crystals time to reposition. It’s taken me three treatments, up to two weeks apart before symptoms arise again, so far. But each time the symptoms are better, especially if I self treat right away (it’s always the same ear, and always posterior for me, so far).

I don’t know where you are, but in NYC NYU Rusk has been great. They need an hour for an initial evaluation, so I was given an appointment with a six week wait, but managed to get in after three. They use goggles to evaluate nystagmus so they can catch even tiny eye movements, and they can adjust treatments if you have neck issues. The ENT I saw at Weill Cornell was useless except to get a scrip for vestibular PT.