Hi Corky
You poor Lady... feeling down and low is really upsetting you, and I feel for you...
Shingles is an eruption of the nerves, like a bad case of Chicken pox. The immuninisation drug you have been given by your doctor is now causing you tiredness and making you distressed, so it may have given you the symptoms of Shingles.
Take it easy, make sure you eat plenty of fresh fruit and veg, to keep your strength up, and drink plenty of fluids, and see your doctor if you have any doubts, he/she should have given you advise to what may be the expected effects after, and how to overcome this.
Take care and hope you and your husband feel better soon
Ginger