My cat goes into hysterics whenever I try to take him to the vet. For many years in California I had a great mobile vet who always took care of him. I just moved to Las Vegas a few months back and most likely because of stress my cat started throwing up. I called this vet weeks ago, left a message, and never received a call back. I was able to fix the issue via my regular vet at Craig Road Animal Hospital, who I would highly recommend.
It takes 30 seconds to return a call, even if it's to say "I'm fully booked."