Just for interest take a look at the following post and see if any of this relates to your presentation: http://www.physiobob.com/forum/patie...down-line.html

You can also search this forum on BPPV to read other posts on vertigo/dizziness and vestibular influences. It might also be interested to see your sugar levels at the times when the symtoms are most vibrant to assess any physiological influences on that.