Herpes lasts 7-10 days, so I'm not sure what you read about herpes that made you so scared--neither the appearance nor the duration sound suspicious for herpes to me. Maybe it was folliculitis (blocked sweat glands) or the like. I'm glad you;'re going for a blood test. Why not get another HIV test at the same time. Then, when they both come back negative, as I believe they will, you can relax and then swear off any further high-risk behavior.
Take care.
Dr. Rockoff