Well I was in mexico a few days ago and had unprotected sex with someone i did not even know on account of I was to drunk. The next day i noticed 3 small red dots on the head of my penis once i retracted my foreskin. There has been no burning or discomfort. Could this be an STD???

Also for the longest time I have had little skin tone bumps all over my scrotum and the shaft of my penis, when i scratch and scrub them to hard they just turn into pimples, and this was before i lost my virginity, what could it be.