Thanks for posting your query.
You are probably having mild genital herpes
, it is very contagious and can be transmitted by physical or sexual contact. Protected dose not necessarily prevent disease transmission. It has very short period of incubation and dose not take 8 months or so to appear after getting entry.
Avoid sex when you or your partner having such rashes, use proper protection.Avoid multiple sex partners.
Keep the area clean.
you can use ointments
if it is itching.
Do not worry, it will resolve in few days.
Hope it helps.