I have a lump just inside the vagina , at the opening. It s not on either side, like it would be if it were a gland blockage...it s directly centered at the opening, on the top. It looks like a small brain and has the texture of a taste bud, & seems to be the same color at the rest of the inner walls of the vagina. It doesn t hurt but it s uncomfortable and about the size of a cherry. What could this be? Should I be concerned?