Thanks for responding and for the welcome 

  The medicine is Rimadyl.  It is her left hind leg, and the vet said it was for swelling.  The vet also said if she wasn't better in 2-3 weeks she'd need surgery 

.  I'm just confused and feeing so bad about the fall.  I know yorkies are prone to patellal luxation (what a fancy name for loose knee caps), but I can't help to wonder if the fall is more the cause than the prone part.  She's so young I just thought this would be an issue when she was older.