It's H (of Helen and Anne)
Sorry to hear about the "Shingles".....my family seem to get this alot and yes it is stressed related but it also closely related to Chicken Pox. Apparently once you get Chicken Pox the virus stays in your body (much like the Herpes virus which can give you Cold sores) and can remain dormant for a number of years until you either under a great deal of stress, or you're run down or (and I think this might be your case) your body's immune system is being attacked (ie: Chemo).
Did you have Chicken Pox as a child ? My brother had a bad dose of it when he was younger and he occasionally gets shingles - in fact he had it on his face right across and down thru his eye! It was really serious and he nearly lost his sight but happily I'm pleased to say he got better.
I know it's not very pleasant but try to hang in there. Possibly the Chemo may have stirred up the virus in your body because your immune system is so down. If you find you're in pain with it ring your Oncologist and/or GP and get something for it. One thing I learnt when I was going thru all this is you don't have to suffer and be in pain.
Oh and I've sent you a reply to your comment on my Post but somehow (I don't what I did wrong) I sent it to myself! LOL !! So if you log on to my blog you'll see your reply! Sorry about that...take care and keep us posted.
Luv H