Unusual lump between anus and vagina

For starters, I'm 16, and a virgin.

So in that area between the anus and the vagina, I have this small lump. It's hardly noticeable when you look at it, so you would have to feel it to notice it. It only hurts a teeny bit, and that's if I press down on it. I used my fingers to feel around it, and I tried squeezing it, but nothing came out. It feels squishy, almost as if there is a little rubber ball on the inside.
Thing is, it hardly makes a visible bump on the outside. I can really only tell that there is a lump by feeling it because its more on the inside than it is out (I hope that made sense)
Could this be a cyst?
A hemroid?
There is no pain, only a tiny bit when I press on it.
I'm embarrassed to go to the doctor about this, but I know I should, so I probably will tomorrow.
ps, I only noticed the lump a couple days ago.
I tried to see if there was any colour to it, but its hard because my shadow always gets in the way.