little flap of skin on vagina?

So I was poking around to put my menstrual cup this morning and I found a little flap of skin. More like a loop, actually, I can put my finger through it. It doesn't hurt or anything, it's just kind of odd that it's there. It's not the remnants of my hymen, it's too low down (like right at the entrance).

I tore a lot when I gave birth to my son, so I'm thinking maybe the stitches healed strangely and I just didn't notice until now (it's been a year and a half). Anyone else had anything like this?

Oh, and all you rude dudes who are going to show up and make uneducated comments to stir up crap... just walk away. Maybe if you get off your *** and stop staring at the screen you'll find a girlfriend who can stand your presence.