I'm 16 and a virgin, but the last few days the area around my vagina has been really sore to touch. The day after it started my period did and the pads just irritated it more and made it very uncomfortable with pants. The area is really red and now has developed a rash (=[). There is also a bit of burning when I pee.

I don't know what it is, how it was caused and how to treat it...