Pumping to induce labor?

Melissa • I`m 37 and a mommy to a handsome little boy.
Has anyone tried it? I'm 40+2 and desperate to get this kid out so I just pumped for a good 15-20 minutes. While I haven't had any contractions, I did end up expressing what I assume is colostrum. I'm just not sure if I should keep what I expressed or just toss it?  Any advice would definitely be appreciated!