Picture Of Shingles Under Breast Does This Look Like Shingles (picture Included)?

Does this look like shingles (picture included)? - picture of shingles under breast

http://tinypic.com/r/9k6xlf/3

Please remember that a few days ago that I have little itch on my shoulder. I napped once or twice. I did not think twice. Then this morning I went to the post and found this. Only in my right shoulder. It did not itch much. I havent scratched the whole day. I'm 20 and I consider myself healthy (go to the gym often). but considered to be underweight. I had shingles before. That's why I'm worried now.
It looks like shingles?
Plus, what would happen if I ignore the tiles and didn't take antivirals? Is it disappear by itself?
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