Anak, please go to your OB or hospital RIGHT NOW if you haven't yet, spotting at 39 weeks with cramping and a tight belly needs to be checked immediately, hindi dapat antayan pa. Your doctor needs to see you today to make sure everything is okay with you and baby. A few of us moms went through similar at the end, but honestly, this is not something to manage at home, you're so close na sa due date, and your body might be signaling something your doctor needs to know about. Please don't delay, ha? Keep us posted once you're safe.