Have you ever said no and the person went ahead anyway?

Yesterday I went to the dentist and I refused to have any more pain and they talked me into agreeing to the dental work. I said no several times. Is it normal for you to be talked into changing your mind? I even had a next appointment on the 7 for teeth cleaning. Also I have 4 more fillings to go on the 12th. They say it is needed or I could lose my teeth.