My dentist filled a large cavity last week and told me it was close to the nerve. Five days later I started having sensitivity and pain off and on. I went in to the office and she put me on steroids and a z-pack. The pain is getting worse and I had to start taking Tylenol with codeine that she also prescribed. I tried to get by without it, but it was the worse pain I have ever had. I am wondering if this is possibly an abscessed tooth because the pain is so bad. The Tylenol with codeine stopped the pain at least. I don't like to take pain meds and usually put up with pain, but this was excruciating.