I will bet she will make it through the night but you need to get an antibiotic in her very soon like tomorrow morning. The go downhill very fast but can recover just as quickly with a good antibiotic. Did the vet not give her anything?
I would also give her some flunixin (banamine or a similar product) and maybe some vitamins. I have had some good response with this three shot combo. I am using Excede currently but not real crazy about applying it in the ear as required, but so far it does seem to work very well. I was using Zactran but it has been unavailable in a small bottle for quite a while.