Baby weight

Hey guys!!

I am 31 weeks pregnant and have been having contractions dr gave me medicine to stop them.

I went in for an ultrasound and she told me my baby weight is 1.1kgs and she said the baby is heathy. I am worried for my baby's weight because everywhere I read it is supposed to be 1.4-1.5

The contractions are better with medicine but if u guys know any food to increase baby weight that would be great!!!

I'm a first time Mama so I am freak out pretty easily.