Tonight as I was brushing my teeth, I noticed a little black flake that looked like a spice from some rice I was eating. I tried to just casually brush it off of the tooth, but instead it pushed upwards, under my gum. I could still see it so attempted to grab the pointed end of my floss stick, and hook it out from under the gums, instead it just went higher up to the point where I can’t see it anymore. Any tips? My local dentist is currently closed, but I think I’m going to make an appointment as soon as I can tomorrow morning.