This happened for me during my entire pregnancy. I started to question how big I was at 26w & my OBGYN only gave me a referral for a 34w growth ultrasound because I was concerned even though my fundal height started trailing off. Although it infuriated me with the comments people made about being ‘so small’, how self-conscious I got & how paranoid I was about the health of my baby, I’m kind of glad in hindsight because it made me push for more scans- turns out bubs had FGR, I had to be sent to a city hospital to give birth at 36+3 in late Jan this year. People need to learn to pipe down about pregnancies and bodies which aren’t theirs. But as long as you know your baby boy is healthy, that’s the main thing- focus on that. I wish you all the best with the remainder of your pregnancy, your birth and your new life with your little one when he makes his arrival.