Aiyooo this is so normal lah, don't worry! A few of us went through this during pregnancy, your pelvic floor muscles are stretched out from the weight of baby and hormones, so even a sneeze or cough can cause a bit of leakage. It usually gets better after delivery, especially if you do your kegel exercises! In the meantime, wear panty liners or switch to ones with more absorbency, and honestly just embrace the granny panties for comfort hehe.