Kim, ask for Buprenex for pain - injectable (if she's good with shots) or oral (you squirt it in the cheek pouch of her mouth) if she's good with taking oral meds. That's a must. Severe pain can cause nausea and vomiting, ask Harley how I know.
If they let you have some, also ask for Anzemet (dolasatron) injectible, or Cerenia injectible. I think Cerenia also comes in pills. Both work wonders for vomiting kitties. But Cerenia is supposed to only be given for 5 days because it builds up in the body.
Zofram (ondansetron) is a milder anti-emetic and I don't know that an ER would have any. It comes in pills. Besides, this situation calls for the big guns.
Scritches to Kitty!