Sounds like a neurological condition or possibly mental...You should continue to get checked out...You don't have a stroke apparently, so perhaps it is a mental state...Are you hallucinating? What makes it worse or better? You have got to advocate for yourself when it comes to health issues.
Also please know there are a lot of idiots on these boards and i'm concerned you'll get a mean heartless response when you sound so sincere, please ignore them if you do, those people are out there