I’m 13 and recently found that my vagina is almost completely blocked apart from a tiny whole that nothing can fit in, not even a tampon, (I haven’t started my period but a tampon definitely would not fit)!? It Hurts a little bit but not a lot. It feels like just a big quite hard lump that’s blocking it and I’ve researched a bit but none sound like what I have? please could anyone give me help or advice of what it might be?