About 5 days ago I noticed a few small red bumps on the head of my penis and I don't know if it's an STD or some kind of dermatitis. There's a few surrounding my urethra and about 10 on the left part of the head. Then there is a larger one that's on the underside of my shaft. It seems like they're spreading. I set up an appointment at a Clinic next week but would like to get a general idea of what this may be before waiting another week. They don't itch and its painless. I did have unprotected sex a few times last month with the same girl and I hope she is not the source. Any educated guesses or factual diagnosis would be very helpful. Thank you.