I have the same head movement/fog issues as you do AND I feel like my brain is bouncing around in my head. If I move my head down then back up I swear I feel my brain move coupled with pain.

I had my first physiotherapy appointment last week . I had to turn my head curtain ways and keep my eyes in fixed positions...after each exercise I was dizzy, nauseous and seeing black clouds. When I got home I had to take painkillers an sleep it off for almost 2 days. Sometimes it feels like somebody is pushing down on the top of my skull with their palm.

I almost feel like its having really bad flu all of the time or something.