Gum Problems behind back molar, flap of skin/gum lifts up
This morning, I woke up and something in the side of my mouth didn't feel right. I felt around with my teeth and I could feel a hunch of flesh, like a flap that I could lift up with the tip of my tongue. It was behind my left back molar, where I used to be able to feel the scar left by my wisdom teeth being pulled. I think I might have torn the gum behind my left back molar when I was flushing in a hurry or picking at my teeth with a fingernail, but I'm not really sure what happened.
I'm in my 30s and had my wisdom teeth pulled years and years ago so it's not wisdom teeth popping up.
I don't have dental insurance so I'm left wondering if it will heal on its own or if it's serious.