Hi. I'm Dr. Lee and will do my best to help.
Is she drinking water at all?
How many times did she vomit?
Does she have any previous medical conditionsHow long has this been going on?
Thanks for the update.
Since she is not drinking water, and vomiting, she is likely dehydrated by now. There are a number of possible causes, including kidney disease, liver disease, pancreatitis, as well as cancer. She needs IV fluid therapy and support now. I would highly suggest to take her to the ER or your vet today and get an examination done, bloodwork, and urinalysis. I would recommend against waiting until tomorrow as dehydration will get worse. If you really cannot go see the vet today, the only thing you can do at home is to make her drink more water, adding Gatorade if needed, or using syringe if needed, to keep her hydration stable.
Please let me know if you have any questions or concerns. Thanks.