When you are sick or if it's an emergency, you will not able to get an appointment. I called when I developed a rash on my shoulder and couldn't get an appointment. I was told to go to the local Urgent Care, which I did as I had the rash for a week. It turned out to be an infection, and I was prescribed antibiotics by a doctor that I had just met for the first time with no knowledge of my medical history.

A week later, I had a fever of over 100 degrees for nearly 24 hours while still on the an