i am agreed with iceman.
you can rule out the carpal tunnel syndrom by flexing maximum ur both wrists against eachother, hold in this position for one minute. if u feel numbness and tingling in ur thumb and index finger, it is a positive sign.

most probably it will be negative.

now follow the further advice by iceman regarding scapholunate ligament tear.
wrist brace is a gud choice and u need to avoid weight bearing , pull and lifting heavy bags hanging on ur hand at least for couple of months.Meanwhile keep doing some isommetric contraction for wrist extensors and radial deviation(moving the wrist towards thumb) infact not moving ur wrist in isometric contration but just put ur other hand to resist the movement , this will keep ur wrist in the same possition but there will be muscle contration.
do this exercise initially in three sets each of 30 repetition with the pause of one minute in each set twice a day.

i hope it will work.

good luck