Imagine you're in bed and want to change position and your head gets slammed with a baseball bat instead. You need to visit the bathroom and if you survive the battering on getting up you then deal with extreme dizziness because you're now on your own two feet and your mind doesn't know if the bathroom is in front or behind you and can't figure out why the room is spinning. You're then rewarded with another slam of the baseball bat just because you have to pee (don't ask about no. 2). Even a simple cough or yawn means another swipe to the head. Blowing your nose is out of the question unless you enjoy screaming - and that will invite another blow to the head as well. Just turning your head a few degrees - wham!
This is like nothing I've ever experienced before and hope will never experience again, and I hope none of you do either. When I'm confident the diagnosis I've been given is the right one I'll let you know what it is, because you don't want this.
The cats are becoming a little pissed off with me I think, but maybe this is what's really going on: