Aw mama, normal lang yan, ang body mo ay nagsasagawa ng cleaning up bago magbigay ng birth, kaya ang loose stools or watery poops ay common sa last weeks of pregnancy, especially closer sa due date. Pero since you're already 39 weeks, better check with your OB just to make sure it's not something else like gastro or early signs of labor, a few of us moms noticed na sometimes ang diarrhea ay pwedeng companion ng labor, so mas safe na i-confirm with your doctor nalang para sa peace of mind mo. Stay hydrated ka talaga, at bantayan mo if may cramping or other changes, okay?