Okay, a few days ago I noticed a bump on my vagina, it was pretty small but it's gotten bigger. I have never had any type of sexual intercourse, so i'm possitive it's not an STD of any kind. I heard somewhere that they can form if you wear clothes that are too tight, is that true ? I have been wearing a tighter size of underwear than what I usually wear, but I don't know if that's what it is. I've had these bumps before, just not this big, and they usually go away. What do I do ? Is this dangerous and/or harmful ? :-(