It seems like a small pimple I’ve noticed it about 3 days ago I have also had a yeast infection a few days ago I’m not sure if that had something to do with it. I am sexually active however both me and my partner were both virgins when we had sex for the first time which was about 2 months ago. We also had pretty rough sex about a week ago so maybe that also has something to do with it but I’m not sure