Wow 17!!!! That is great, I guess it's about time to start having some senior illnesses,
Your cat is Dehydrated and will need IV fluids to stabilize her. I say this because vomiting, diarrhea,and drinking lots more water are major signs she needs to see the vet. She may have a blockage in her intestines if she is throwing uo that much and is constipated.
I know money can be a problem , but she needs to get to an emergency Animal Clinic ASAP. They are usually very good when it is emergency--they will let you pay when you can. So please have her see a vet, she needs your intervention.
Please let us know how the little lady makes out, K?
This sounds like a major bowel obstruction. This is an emergency. If you have an established vet, they will be willing to let you post date checks or make payments.
This is an emergency. Bowel obstructions are deadly. She really needs emergency treatment now.
Thank you for the advice. She is doing much better now and is on the mend. She has already gotten her appetite back and is much more alert.