she probably will be okay tonight. You can try putting a premie onesize on her. You will need to put it on her backwards so her tail sticks out of the panty part that snaps. When I did this with Maggie May, she peed right thru the onesize before I could grab her,lol I hope your little one recovers quickly.
I know that her spay was today but you can check out my soft collars by clicking the link in my signature. They are so much easier on our babies that though plastic thingys.