I slept with a guy last week, and a couple of days ago this appeared on my bottom lip. What is it? It doesn't much hurt, it did a little to start off with. I haven't put any cream on it because I don't know what it is. I'm just a little nervous it's herpes, and if it is, what else I may have gotten from this guy. Thank you.

Thanks everyone. I got over my initial shame and embarrassment and have decided to go to see a GP.