Sometimes things take a while to work...I'm sure you know that...usually my laxatives kick in when I am miles from anywhere with a car full of screaming 6 year olds. :)
Tea with senna sometimes helps me. Tastes vile but if you put enough honey in it, it is drinkable. Correctol sells a version of Senna tea but you can get the natural variety at stores that carry a decent selection of teas, including health food and vitamin stores.
Good luck...hope you feel better soon and that you are near a bathroom when things start moving.
Love,
Lynda M. in AZ