I'm sorry about your cat, Phillip. I know it is very difficult decision whether to put your cat to sleep or not. There is nothing to feel guilty about because you're doing your best as you can try to take care of your cat. We'll support you no matter what. You can talk to the vet and decide what you want to do.
We've lost our black lab due to poor health back in '02. We were planning on taking him to the vet right after we returned from our vacation in Jamaica. However five or six hours before we were due to head out to the airport, he wobbled into the living room and laid down to sleep. But we took one look at him, he was really dying. I comforted him while calling my oldest son who had our car at that time at the store to come home right away to take him to the vet. But he died already before my son came, so we took him to the vet anyway to have him cremated. We got the urn and put in the shelf with his collar. It was very tough on us. I cried on the plane all the way to Jamaica. My kids, hubby and I loved him so much because he was a great dog for 12 years.
Hang on there, Phillip. ((hugs))