so I was showering this morning and as I started to shave (down there) I noticed a lump inside my skin on the outer lip of my vaginia, like on my lip above my clitoris. it's about the size of a pea, it's sore to the touch as well kinda like a bruise. it wasn't there lastnight but that's side of my vagina seemed to be a little sore and this morning when I showered it was there. should I be concerned ? or is this something common and self treatable ?