In reply to Exocet:
I had an episode of BPPV whilst on holiday in Whistler (fantastic timing!)
Was utterly horrible and very scary when it first came on, you have my sympathy.
As medical insurance only covered life-threatening conditions I treated it myself by repeatedly inducing the sensation until my brain managed to become so accustomed to it, that it ignored the messages from my inner ear (or something like that - it worked anyway).
Google Brandtt-Daroff exercises for detailed instructions.
How I did it was, sat on a bed, went from sitting to lying down on my back quickly, waited for symptoms to subside, moved my head to the left sharply, waited for symptoms, moved my head back to centre, waited for symptoms to subside, moved head sharply to right etc.
I realised that it was only my left side which needed treatment, so concentrated on that. Three sets of exercises, three times a day. It lessened greatly after I started the exercises and was gone within a fortnight. I believe some people need to take anti-sickness remedies before doing them, I was kind of OK (i.e. didn't actually puke, but had a lot of cold sweats, hideously nauseas sensations.
I haven't had any recurrence but now have a horror of any spinning motion (hate hanging on a rope below an overhang for that reason, and will probably never go on a roller coaster or waltzer again).
Good luck.