RSI doesn't always affect your wrist, it does in most cases tho. It could affect your tendons and joints in your whole hand. And of course other places of the body. And it's not always pain either. It could be loss of strength and such. I remember having the exact sort of "bruised" feeling you seem to have. That pain in specific didn't last long at all for me.
Try placing your hand in warm water for a minute and do gently movements with your fingers, and then relax. Stay off for a few days at least and then try again. If that doesn't work, see a doctor, and/or contact Dr.Levi