My tooth needs root canal

Heyy!!
I’m an Hr manager working in an IT company and I have a very busy schedule. Every time I used to be very busy with phone calls and meetings. I used to reach home by midnight and I was less bothered about my health. It’s been certain months since I have taken care of my dental health. Yesterday night I was troubled with a severe toothache. I couldn’t eat my breakfast due to this. I took half day leave in my office and went to a nearby clinic which was suggested by my aunt. The dentist suggested root canal treatment procedure ( http://www.centenarydental.com/root-canal-treatment/ ) to be done immediately as my tooth’s condition is too bad. Is root canal treatment painful? I’m little tensed as I’m scared of all dental procedures. The next appointment is scheduled for the coming week. Will I need rest for a long time after the procedure? Please pray for me.