At this point, you need to visit a clinic to determine the cause of any medical issues, and to get tested if you want to. Our members are not able to diagnose the cause of your red dots.
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The only risks for HIV in adults are:
1) Having unprotected anal or vaginal sex, or
2) sharing intravenous needles with IV drug users.
You didn't have a risk for HIV, and even if you had, symptoms don't show up in a few days.
I'll let the STD experts address your STD risk.