OH NO !!  I hope she's going to be ok and heals quickly !!!
 
That happens more than we know and I'm just glad to hear the break was treatable and she got to come home without emergency surgery....Bless her heart - that must have hurt  

 and I'm so sorry that happened..... 
You must have freaked ...I know I would have...but going straight to the vet was the best thing you could do......Also....THIS could happen to ANY of us...remember that ok ?  This wasn't your fault so try not to beat yourself up over it....HUGS TO YOU.....I know you can still hear her cries in your head..... 
While she heals - you could consider a stroller for her to keep her off her leg ?    
SENDING GRACIE LOTS and LOTS of Get well wishes.....