Castor Oil?

From my first due date, I'll be 39 weeks and 2 days tomorrow. They changed my due date because of an ultrasound to a week and 2 days later around 12 weeks which would make me 38 weeks Sunday.  She is measuring what she should be at her first due date and the doctor has told me she's dropped way further than he's expected. That she should come this week (which would be the first due date they gave me). I was wondering your thoughts on castor oil to induce labor. My mom suggested I do it tomorrow. She said if it happens and it works then it works. If it doesn't then it wasn't meant to yet.