1. According to what you said, your tooth probably did not have a root canal, because according to what you said, it is nerve pain, not apicalitis, and does not require root canal treatment.

2. Of course, you can change the clinic to get a dental crown. This is your right. However, after the nerve has been killed, the tooth is particularly easy to split when biting something hard. If you don’t want a crown, be careful not to eat hard food on this side. You are still young, so it is better to get a crown.