Get to the docs. I had shingles 18 months ago, at first I had intense stabbing pains in my chest on the rhs which I ignored as it wasn't my heart, then I got some spots and I discounted these as ant bites (I'd been lying on my side whilst gardening), but then more spots and by the time I went to the docs the spots covered my shoulder and side. Whatever he gave me helped, but apparently the earlier you catch it the better. I had six weeks of itching and scabbing, the itching was intense, especially the first couple of weeks. Calamine lotion helps (spell check put gasoline, which is a bit drastic). I've still got the scarring on my back.
Shingles can be triggered by stress, which given I was in the middle of moving house and had been living at my in laws for three months, I'd go along with.