I had series of inner ear infections about 20 years ago, including a nasty bout of dizziness/room spinning whenever tilting my head back, even slightly. It improved, but I still get periodic episodes (once or twice a year), and I do the home version of the Epley exercises, which I found on WebMD.

It woks great, and usually takes one session, or sometimes 2. I do not sleep sitting up afterwards, but might use an extra pillow at night for the next few nights.

Good luck, CC!