Oo, normal lang yan actually! Maraming kaibigan ko na nakaexperience ng diarrhea towards the end ng pregnancy, parang way ng body mo to prepare for labor, ang hormones kasi nagbabago pa rin even that late. Pero since you're already at 37 weeks and beyond, mas importante na maging hydrated ka talaga at monitor ang movements mo, kaya best check with your OB just to be sure everything's okay, especially if may cramping or unusual symptoms pa.