Dear FLClover,
I'm 62, and have had shingles 3 times. ( Not currently with my cancer treatment.) I'm glad you are seeing your GP.
There are antiviral drugs for shingles, but they usually need to be started early to be effective.
You did not say much about where your rash is. Shingles do not usually cross the centre of the body, usually only occurs following a nerve pathway on one side.
Shingles can be painful. In my experience it wasn't. Just itchy and an odd sensation.
If it is on the face or near an eye, it is very important to see a Doctor. Best wishes