Thanks for your query.
It could be a STD
based on the history you presented with.
And It Is highly recommended to visit a gynecologist or a Dermatologist
, since It needs thorough examination.
And also do not go for any self medication
since each STD has a different antibiotic regime and It needs to be used for appropriate period.
Please do not hesitate to meet a doctor and reveal your active sexual life, which Is Important part In history.
It Is advisable to start your sexual life post marriage to respect our moral values.
Also focus on your career and you can go for masturbation
and get satisfied till your marriage.
Hope I have answered your query.
I will be available for your followup queries if any.
Wishing you good health.