Try these exercises for carpal tunnel pain and numbness. You don't have to stand up to do the exercises. I used to do them several times throughout the day while sitting at my computer at work. If you do them regularly, they will hopefully start alleviating the numbness and pain. The exercises worked for me. I hope they help you. Also, be sure and wear your wrist brace to bed every night.
http://www.expertvillage.com/video-series/425_carpal-tunnel.htm
http://www.carpaltunnelexercises.net/
http://www.carpaltunnelhelp.info/basics.php