Over the last few weeks, I have had a strange feeling in my head difficult to explain. It feels like my brain is shifting and feel I might faint, blackout or fit. I also feel a bit sick when it happens, sometimes I have a slight headache when it happens. I was helping my daughter with college work yesterday, well I was trying my best, it got to the point, when I felt I couldn't take anymore information in, then it felt like something moved in my head, felt faint, sick, I had to go to bed for a couple of hours. This is happening more often now at least once a day. Not sure if its to do with my Alzheimers or not. Has anyone else had this feeling.