Have any of you used evening primrose oil to help get labor started? if you have did it work and how long did it take? were there any side effects? did you take it orally or vaginally? I am dialated to 4cm, but have not started active labor I am really wanting to get things jump started, but i am not willing to try castor oil as I did try it with my last baby and it made me throw up and I am already nauseated. any experience or advice would be helpful! Thanks