For future reference, you shouldn't do that. The snake was probably a bit stressed out from that.
Next time, take a large large tupperware, or other bowl, and put the warm water in it up until she's almost covered, but leave some space for her to sit in the water, and not have to "Swim". Let her sit in that for 30 mins as it's dark, and calm, and quiet. Then take her out and let her run through a warm cloth.