Hello everyone) I'm 32 weeks pregnant and have gained 3 kilograms in …

Hello everyone) I'm 32 weeks pregnant and have gained 3 kilograms in that time. The baby is pulling everything out of me, I've become very thin. I was really worried about him being small. I recently got sick again and lost what I gained. I weigh as much as before pregnancy. Yesterday I had an ultrasound. The belly is small, neat. And then they told me that the son is 2400, 47 cm, 33 cm head volume. They also said that the norm is 1700-1900. Has anyone had this? What babies did they give birth to? I don't know how to behave.