Shingles?

I have a little rash on my lower right arm - about 20 little blisters clustered around a band about 3 inches long on my inner arm. It doesn’t hurt, but it itches quite a bit. One of the blisters popped on its own yesterday. I went to a GP (general practitioner) yesterday and he said it looked like shingles, although it’s rare to have it on a limb rather than on the torso or face. The doctor gave me some Acyclovir/Zovirax cream to put on it 5 times a day. Since my immune system is suppressed due to my cancer treatment, I’m more susceptible to viral infections, or any other type of infections for that matter. At least it’s just a tiny area and not full-blown shingles that I’ve read about. Thank goodness for small favors!