I was boxing someone tonigt, I can usually go at least 5 rounds, but about the second round I got all light headed, and a second later I was in the arms of a blackbelt who was nearbye, I apparenty fainted. Good thing someone caught me or I wouldv'e smashed my head into a mirror. The people just told me to take it easy for the rest of the night, and led me to chill out into the office untill the end of class where I was driven home by someone, as always. That was a few hours ago and for some reason I feel all shaky and dizzy, kinda nauseuous? Never happened before, what could it have been? The guy didn't hit me in the head or any pressure points or whatever.
Low blood pressure maybe? Same thing happened to me when I did taekwondo, that was from low blood pressure according to docs.