About 5 days ago I developed a strange lesion in my inner labia, very close to my vaginal entrance. I didn't think much of it, until I got a fever and fell very ill. When I was at the doctor for this, I had them look at the lesion, but as I've never had sex before they told me it was just an irritation from tight pants and underwear. Simultaneous with this flu-like virus, the lesion appears to be getting worse and much more painful and I think there may be another forming directly opposite of it. On top of this, I got my period and now all that junk is flowing directly onto and into the sore. What is this! What should I do about it?