Boy am I mad at my vet!

Snoodles was sick and wouldn't eat and was shaking all over. When I took her out to potty, her bowel movement was just full of mucus!

So, naturally, I came in took the sample, and called my vet! They said to make an appointment for Friday at 12. I told them how little she was--3#--and that little dogs can go down fast! Still couldn't get past the receptionist. If I wasn't worried, I wouldn't have called the vet. I feel that is why I have a vet!!!! I asked if I could take the sample in and have it looked at! No, they would get one when I brought her in! Dang! So, I took her off all food for 24 hours, then added just rice--1 Teaspoonful. Two hours later, added a little non fat chicken broth, and then in another 2 hours added rice and non-fat cottage cheese. She perked right up! Had an intestional upset, I guess! So, Friday, I canceled the vet. The receptionist said are you sure? To which I answered YES! You wouldn't take her when she needed it, so why should I come in when she is feeling better? She said she might get worse over the week-end, and then I would have to pay an emergency bill. I told her if this happened, I would take her to another vet period!
This makes me so mad, because if one has a sick dog and calls the vet, I feel they should be able to see them that same day. It could mean a big difference in the dog's health and recovery! Do any of you have this problem?
Pat