Your upper front tooth is broken right in half. Now it really hurts. You decide to proceed before your up-coming job change and loss of insurance coverage. It was a little sensitive while she worked on it. Now, three days later, it's killing you.
Cold things are extremely sensitive.
It hurts to chew on it. Day by day it's getting worse. Eight years ago you had a root canal while on vacation in Tijuana. Your new dentist just took an x-ray and said there is now a black spot near the root end indicating an abscess in the bone.