Get treatment for my tooth

Hello everyone, I am Ayush here. Firstly I want to tell you that I have a problem with my upper tooth. Actually, before some time I just stopped to brush 2 times a day. And in results, I saw that my tooth is giving me pain. And the pain is started from this inside of the tooth. In starting I ignored it but after some time when I visited the dentist he said that your tooth has a problem and it will need treatment to be right. The treatment he suggested was a root canal and I did not know that what is this treatment and how is this conducted? Guys this treatment will start by tomorrow and I seriously worried about to pain that I will have to face. Please tell me all those instructions which I must follow to secure my teeth nicely.

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