Shingles can be very...very painful. Depending where you have them on your body...they can even be dangerous. My H had them to start at his forehead and almost got into his eys. The doctor said it would have put his eye out if that had happened. Please be careful. I don't know if you should be doing all that physical activity or not. May need to look the information up on the Internet. I don't think they are contagious--except being around pregnant women could run a high risk of her unborn baby....is what I've heard. Kind of like a pregnant woman being exposed to the measles. Maybe that is why he said to not get around crowds.
Oh, also I remember that it worked overtime on my H's nerves. Don't know if it was due to pain...where it was located...or if that is part of the symptoms. If your boys start getting too much for this weekend, you may need to cut it short and rest. I am concerned that you are playing tennis b/c you need to take the shingles serious. They could end up making you quite sick.
There I go sounding like a mom again....sorry.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!