After a workout my minds gets blank like mental block and what can i do about it?

Maybe you are short of potassium, you should try to eat 1 or 2 bananas before you go work out. I know it's hard to slow down workout, I can't either lol. And I know it's really annoying while other do harder workouts and have no problems, but I have read and heard that those symptoms can be really dangerous. It will get really dangerous when you pass out or puke, puke blood or you can get internal brain bleeding, which can lead to dead in just a hour. You should really go see a doctor or a physiotherapist.