If the baby isn't coming, he's not ready and 'forcing' it could be detrimental. I know how hard the last little bit is, but it's super important! Hang in there honey, before you know it you'll be holding him and won't even be thinking about these last few days/weeks.
castor oil will make u have a terrible bowel movement, it was an old remedy that old folks thought would bring on labor from the constant BM and sometimes forcing. it's not recommended