I agree with the others, sounds like you may have been overdoing the keyboarding. If you are concerned see your doctor.
Julie
Panic attacks can cause numbness and coldness in your hands, and so can improper positioning of your arms. When I'm in a bad position at the desk and the edge is cutting into my hands, they'll go numb.
I recommend a wrist rest for your keyboard, and another for your mouse - try that first, and if you're still having problems, talk to your doc.
I wouldn't worry too much. It might just be from the computer and your hand position. Maybe you should see a doc. It could be as simple as carpal tunnel.
Try doing some stretches and take a break from the keyboard and/or video game controllers.
Hope that helps some.
Take care and keep us updated.