Oh and klamidia recommended good probiotics. That's awesome advice. That will help protect your stomach, and also help prevent fungal infections while on antibiotics.
https://health.usnews.com/wellness/articles/getting-your-probiotic-fix-when-taking-antibiotics
I just read your other post, and you've been on a LOT of antibiotics. This could be the start of a fungal infection, like yeast/thrush, which could be the result of so many antibiotics. It's not likely to be herpes without other symptoms, and if it was ingrown hairs, you'd be able to see those.
If it lingers, follow up with your doctor about it. I'd be really hesitant to tell you to self-treat, given all the other meds you've been on, so let your doctor treat this.