Ay, don't worry too much mama, small babies pa lang talaga at 33 weeks, normal yan! A few of us here had similar concerns, and honestly, pag consistent ka lang sa vitamins at good nutrition like the doc said, tataas talaga ang weight as you approach delivery. Try eating more protein-rich foods (eggs, fish, chicken), and pwede din ng extra snacks like peanut butter, avocado, or milk products throughout the day, helped my friend's baby gain better kasi laging may extra calories. But honestly, best mo talaga is to follow-up with your OB regularly para makita kung tumaas na ang weight, kasi every baby grows differently and they know best kung may concern talaga or normal lang, wag ka mag-stress pa kasi nakakaadjust naman ang baby weight towards the end ng pregnancy!