Well, the wasp sting has slowly faded away and Tink's snout has returned to its pre-trauma size. She was a little lethargic yesterday because of the Benadryl, but it helped the swelling go down within an hour of being used.
Now, she is back to her weird, quirky self.
So, file this fact away for future use:
Benadryl: it's not just for humans anymore. *
*please consult your vet before using in your own dog....