Shingles without pain?

I just went to my doctor about a rash around my waist area and he diagnosed it as shingles. However, there is no pain involved, just itchiness. I told him that but he seemed to think it was still shingles. I've checked everywhere online and it seems that pain usually always comes before the rash, which I got a few days ago. Is it possible that the pain will come later or has my doctor misdiagnosed me?