It could be genital warts, or perhaps Fordyce spots, but only a doctor is going to be able to tell you for sure.
https://en.wikipedia.org/wiki/Fordyce_spots - it's a wiki article, but it's got some good pics you can check out.
Since you've had unprotected sex, it's a good idea to get tested for other things, like gonorrhea and chlamydia, which you can have without symptoms, so you can get that done while you get these checked out.