Hi Lois, I may know exactly what you are referring to (or not). My wife had vertigo and she and I used something on her called the "Epley Maneuver" to get the stray crystals back into their correct locations in the inner ear. We did this by referring to a Youtube video. I don't know which one we watched but here is one I found that goes through the same steps essentially:

Anway, it sounds like you might be describing this Epley thing that we did or something similar. It was totally easy and successful when we did it. Regards, Hank