Playing the Playstation 3 makes me nauseous? HELP?!?

Every time I play a game on the Playstation 3, no matter what it is, I get nauseous. I never had this problem playing PS1 or PS2. Could this be motion sickness due to the enhanced movement compared to the older systems? What could be wrong with me that is causing this sensitivity to it? Is there a name for it? What can I do? PLEASE HELP!!!