I have odd sensation in my head (kind of light headed) I don't feel like throwing up though. Hard to describe but bad enough I did not feel comfortable driving. Seems like only thing that helps is sleep but that doesn't always work either. First time was past summer and came on fast and lasted for over a week before I felt back to normal. Now it has happened periodically over the past 5 months. I have had MRI, Ultrasound of the heart, tested for vertigo, had crystals moved in head, blood sugar checked, vitamin D, thyroid, to name a few. I have also tried the chiropractor and messaage therapy. Doctors seem stumped but it is still happening.