A little over a month ago I went to my general dentist and had a root canal done. Now a little over a month later I went back and told her it was still bothering me and it looks cracked (It doesn't have a crown or cap on it) She picked at it and I flinched in pain she doesn't understand why I can still feel that tooth. I already have an appointment to go back but I'm wondering what this COULD be I know you can't say exactly what but I need some information please. Everyone I call to ask questions won't tell me anything. It's sensitive to hard, chewy foods, pressure, and sometimes hot and cold. Thank you for any information.