Very likely you have some kind of mild head trauma, possibly a concussion to some degree or another. This could cause all kinds of involuntary sweating, confusion, anxiety, hypertension, etc. The dr's visit will be easy, and it's not the end of the world. But - if you have taken any lumps to the noggin, even ones you 'think' aren't so bad, and you have ANY wacky symptoms, its better off getting checked.
I've been in plenty of fights, and been dumped on my head a few times in grappling tournaments and been concussed. Sometimes the issues doesn't show itself for awhile. And I'm sure I lost a few brain cells along the way. Just be sure.