I noticed ~4 days ago some tenderness above an upper molar on the right side of my face (#13 I think). I continued to brush the area, perhaps even more than usual. Today I looked in my mouth, and noticed that an entire little piece of my gum is missing right at the gum line. It is somewhat circular, and is about 3mm in size. Where there used to be gum, there is now only tooth (i.e. the entire tissue of that little area is gone). It is not necessarily discolored -- though there is a minuscule area of scab from brushing. If I feel the area with my tongue, it just feels like an abnormally long tooth.
What happened? What should I do? Will this go away??
I use no tobacco products, I'm a social drinker, I brush daily but do not floss. I use a soft bristle brush. I do not have access to a dentist at the moment due to travel.