Loose stool before labor

I’m 36 weeks with baby #3 and feel like absolute shit today. Tons of crampy contractions, backache, pain in vagina, nauseous, and have pooped 4 times with bad stomach cramps (sorry TMI). The last is very different for me because I’ve been on Zofran my whole pregnancy and on iron the last 6 weeks and I typically poop once every few days and it’s difficult. I do NOT want him to come for at least another week. I don’t remember experiencing this soft stool with my first two.

If you have had it before, how long was it before you went into full blown labor?