3 days ago I received oral sex, I am a male. the day after, I felt uncomfortable in the pubic region with slight pain, as if the hairs were being pulled. I noticed a small bump like a pimple near my thigh. Today, 3 days after first feeling like this, I now how small outbreaks on the pubic region of a red rash with small bumps, very few with liguid. I would like to know if this is a rash or something like and std