I have a small hole in my tooth, and I don't think I have a cavity in it though. I have taken photos of it, had people look in it to see if I had any black in the hole(signs of a cavity) but there isn't any... and I've done things like expose it to cold water and place a toothpick in it to check if any of that hurt it, and it didnt.. I am wondering if i could still have a cavity? And will I have to get a filling in the hole? Will it hurt?