D.B.
If it is vertigo, there is a very simple, safe solution that won't cause harm (even if it isn't vertigo). I had it once, and the way the doctor described it is that something gets dislodged in the ear canal like a "pebble." That pebble bumps around the circular ear canal, making the body think that up is down or sideways is down. If you look on the internet or consult a doctor, there is a series of head and body twists (nothing drastic, very gentle) that helps move the "pebble" to a place where it doesn't interfere with the balance in the ear canal. It starts something like, "Twist the head to the right 90 degrees. Hold it still for 30 seconds. Move the body to the right..." It is very simple, works well, and can be used again if the pebble is dislodged. The doctor did it on my once, and then later I did it on my livingroom sofa.
Good luck! db