How long do you need to take off work if you have Zoster a.k.a. Shingles to get better?

I went back to work almost immediately and work in a very stressful workplace. I think that I am might have made a mistake by going back so quickly. Boss's are understanding at first but when they need you there and they are too lazy to do things on their own all reason seems to fly out the window. What is a reasonable time to give yourself to get better. I was diagnosed July 7th and went to work three days of that week. And now am here at home waiting for the urgent care to open up to try to get a doctor's note.