Uy mama, don't worry pa, maraming cases na ganyan talaga, ang baby position lang at body type kaya di bumababa ang tyan ng obvious! A few of us mums sa circle namin din ganyan, tapos bigla lang nag-labor without warning na walang dramatic tummy drop, so it's totally normal. Since you're at 39 weeks na though, best talaga to check with your OB about your cervix status and baby's position, they can give you the real picture kung ready na kayo or how much longer. Every pregnancy is so different kaya don't compare sa ibang babies, your body knows what to do!