Sis, normal lang yan at common sa 39 weeks, ang tiyan mo ay tightening (Braxton Hicks) lalo na pag may activity or pagod ka, pero usually hindi painful at mag-ease out after a few minutes. Pero ang less movement ng baby ay dapat i-check mo talaga with your OB kaagad, lalo na since you're almost due na, better safe than sorry, kaya message your doctor or kahit mag-visit na lang you para ma-monitor ang baby's heartbeat at amniotic fluid level.