Castir oil?

Okay, if your on this post to say its not safe or anything else negative please leave! My doctor has given me permission! Okay so i want to try castor oil but i have a lot of questions.

1. How do you know diarrhea will be gone before delivery?

2. I hate water with a passion! Is there anything else i can drink to keep myself hydrated? What about Gatorade?

3. Im dilated to 2,90% effaced and -3 station, what are the chances of it actually working?

4. I've had pre term labor the whole pregnancy and now that im 39 weeks the baby decided to give up, will my pre term labor history help me?

5. I cant even stand the smell of pizza so what's the best way to dilute it?