Sorry to hear that... i think most golfers have exprienced dropping/lost clubs or putter head covers and other stuff sometime in their past, so it actually quite common. I myself have left clubs behind probably 3-4 times in the past but luckily usually able to recover as discover immediately (at next hole) and went back to the flight behind to ask for it.
A ladies wedge might not be such a 'prized' item so there is a good chance you can recover it if you call or better still go down personally to ask the caddie master or equivilant person-in-charge.
Make it a habbit to do a quick check of your clubs at the end of the game. Once you leave the golf course, chances to finding that lost item diminishes.
Hope you find it, else take it as an expensive lesson.