Castor oil help?

Ok ladies.. my midwife okayed castor oil because i was a little constipated (im also 39 +4 so the going into labor thing wouldn't be awful). I took about a table spoon and a half at 730. Now at 830 the laxative part has definitely kicked in, sorry tmi. But so has an awful headache and I'm suddenly sweating bullets im so hot. I've got a pressure and lightning crotch like pain down there when I walk/stand. Is all of this normal or should I be worried?

Please don't comment telling me why you don't like castor oil or why you won't use it, that's not what this post is about. My midwife cleared it for me to use and said it was safe so thats what I'm going with. Thank you in advance!