Good afternoon, for the last couple of weeks I have had a feeling in my head sort of: like the way your heart beats or feelings like my brain is moving inside my skull, a pulsating sensation, and/or a very, very slight diziness. I tired looking in the mirror and have asked other people to see if my head is actually moving and everyone said no. I experience this sensation when I am sitting down and start to think about. I can perform all my daily tasks with no trouble or pain. ALso while doing my "to dos" I do not even experience this feeling. Does anyone have any ideas what this could be? Any insight would be greatly appreciated