It sure sounds like shingles (I just came out of a bout of that in June).
Are you having any other symptoms, like slight fever? That is an odd place
to have the pain--it is normally in the trunk (anywhere from the buttocks/
hips up to the shoulder/base of neck area). This is interesting--the
chiropractor I went to for this problem told me he had 3 recent cases of
shingles, and these were not elderly people. Another woman told me her
mother just had gotten over it (age 53) and someone they knew, age 33, was
going thru it.