in between two of my top teeth, I have had some swelling for about a week now. I have been paying close attention to it and have tried to take care of the area. However, today I was looking at it and there is a tiny dark spot, about the size of a tip of a pencil now in between the teeth. I am calling to make a dentist appointment on Monday but wanted a heads up on what it might be. I am not a heavy smoker, but have smoked in the past. Never more than a half a pack a week if any.