A few days ago, a sore spot arose in my mouth, right at the front bottom. It was the gums, though I thought it was the inside of my cheek. It's been about two days since then, and it got worse, though seems to be getting better. I decided to look at it in the mirror, and see a small... I cant' call it a hole, because it doesn't go through. It's like a tiny cubby hole, and it's rather painful. What is this? I'm freaking out.