I can assure you that even though it is true that your brain does literally float inside the skull it is not moving the way you think nor can you feel it moving. There isn t (well, there shouldn t be) a whole lot of room up there under normal circumstances for such movement so that s one point. Although I am firmly grounded in the belief that a good neurological examination should always be done on someone with your symptoms I can also say with some degree of confidence that speaking to your physician about these issues may help them direct you to other specialists as well who may be able to help. I detect anxiousness and nervousness as well as an element of isolation that may have a lot to do with at least some of your symptoms. Bottom line, get a good neurological workup and see what the neurologist thinks of your case and then, be sure to talk things through with your primary doctor to see if other consultations may not help get some answers as well. All the best health to you.