Induction

Can your doctor's office force you to get an induction? I heard legally you have until 42 weeks. But my doctors office will let patients go to 41 weeks. At my last appointment I was 39 + 5 and right away the doctor said "we are going to schedule your induction today" so they scheduled it for Sunday night when I'll be 41 + 1. But I really don't want to get induced if it's not completely necessary! I don't have medical reason for it. But I'm afraid if I cancel it they won't see me anymore since their standard protocol is to only let women go to 41 weeks.