Not feeling as hungry as what most moms are experiencing in 25 weeks, and baby is slightly small, is it normal?

Hi, doctor says my baby is slightly small and asks me to keep eating. But I don’t really feel hungry in between meals. Usually I will have full meals such as noodles and rice. I may just snack a bit before dinner but this seems not enough for baby to grow bigger. Anyone experiencing this? I don’t really like sweet food and biscuits unless I’m really hungry at work. How should I eat to make baby grow faster? #advicepls