alelks,
Read this link about Benign Proximinal Positional Vertigo...BPPV.
http://www.dizziness-and-balance.com...bppv/bppv.html
It is caused by the calcium crystals in the utricle coming loose and migrating into your semicircular canals in the inner ear. THis can cause a false sense of motion and cause vertigo when the eyes and the inner ear don't sense the same motion.
Again, the doc to see about this is a neurotologist in the ENT deaprtment of any hospital that has a balance center.