I get BPPV, I have had a couple of bouts this week. It comes and goes as the crystals try to find somewhere to lodge and can last for a few days, or even longer. Each episode can last quite a few minutes or just a few seconds, I have to be careful when driving not to turn my head too sharply.
My grandfather had menieres disease and really suffered with it. It started after he was bombed twice from his ship during the war. He had hearing loss and wore a hearing aid, but it became hard for him to go out socially because he was so worried that he would have an episode when he was out. A bit like an epileptic I suppose.
Once he was steering his boat with the whole family on it up the Thames and we were suddenly aware that he was on the wrong side of the river, gripping the wheel with both hands trying not to fall over, as men in yachts tried frantically to steer out of his way whilst shouting insults at him. Another time I was crossing the road with him, the light went green and I walked, then realised that he wasn't with me. I turned back to see him swinging round and round the lamppost, stumbling as he went. A man shouted at him and called him a drunk old man.
He was always very shaken afterwards, and my grandmother did all the driving.