I tried it last week started off with mild contractions went to bed woke up hour and half later with really strong painful contractions 3 minutes apart. No diarrhea just a ton of pain and pressure. However ended up with 2 trips to l&d, a whole day in pain and didn't even thin out or dilate anymore than I already was. Hope it works for you, good luck.
I did castrol oil in warm rootbeer and contractions started slow for the first few hours but picked up quick
My labor started slow with castor oil. Just noticeable contractions to start then much stronger and 3 minutes apart within 5 hours.
All it did for me ever was moved my bowels lol. Good luck!
Never used castor oil but that sounds like early labor to me! Best of luck to you. Happy almost due date!