Aww mama, I can totally understand your worries lah, especially after the emergency c-section with your first one, it's only natural to feel uncertain. A few of my mum friends who are petite like you (one is 145cm) have managed normal delivery on their second attempt even after a previous c-section, but honestly the safest thing is to have a proper chat with your OB or a maternal specialist soon, since you're already at 33 weeks and every pregnancy + every mum's body is different, especially with your little one's previous heart concern. They'll assess your pelvic size, baby's size, and your scar from the first surgery to give you the best chance and safest option. Jangan stress mummy, you've got this, whether normal or c-section, your body knows how to bring baby safely!