I jump roped just a couple of days before I had my first child - just because someone told me I couldn't. I can be kind of contrary sometimes.
But I don't think it made it happen any faster. Although ... he was born just four days past my due date and the whole thing (start to finish) only took 2 hours and 55 minutes.
So...
Meanwhile, I believe nipple stimulation will make your uterus contract - so you can enlist your husband's help, or do it yourself (on the sneak, if that's what appeals) and see what happens.
Best of luck!