Hello,
I cannot confirm anything without examination but the site and symptoms are suggestive of shingles. The first sign is usually a tingling feeling, itchiness, or stabbing pain on the skin. After a few days, a rash appears as a band or patch of raised dots on the side of the trunk or face. The rash develops into small, fluid-filled blisters which begin to dry out and crust over within several days. When the rash is at its peak, symptoms can range from mild itching to extreme and intense pain. The other possibilities are of heat rash, sweat dermatitis or folliculitis.
My sincere advice would be to consult a dermatologist.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Also, 95% of these dots disappear when you do the "glass test" and push on them, so that seems to be a strike against petechiae. That and they are now mostly bumps.