Ay don't worry, mama! Every pregnancy is so different, lalo na kung may galong taon na ang gap, honestly, a few of us sa circle namin na nag-third baby after long gaps felt the same way, parang first-timer ulit talaga ang feeling kasi ang laki ng adjustment ng katawan haha. At 27 weeks with your height, normal lang yung variation ng bump size kung mabilis lang ang growth ng baby mo, pero if you're really anxious about it, okay lang mag-check with your OB para sa peace of mind, they can measure and make sure everything's on track. You've done this twice before kaya alam mo na ng body mo, trust that!