OMG. I had a tooth on my upper right that gave me pain when I bite on it. My endodontist said I had a crack on my tooth and if I want to save the tooth, I needed a root canal. So I did and now my whole entire teeth is sensitive and in pain especially to any temperature. I have never had problems with sensitivity in my teeth or any other pain. Is this normal after a root canal. I am so scared this pain will continue because I cannot live like this.