Baby weight

So I’m am now 34 weeks and 3 days and I last went to the doctor when I was 33 week and some days to check my baby growth. They told me my baby was in the 30% range which was 3 pounds and 14 ounces. They say she will be thinner then my boys who weighted 6 lbs 14.9 ounces and 7 lbs and 8ounces . I’m a little concerned because I eat a lot but didn’t expect my baby to be that tiny at 33 weeks. I’m due dec 30,2020 and I’m always worried about it now. Has anyone else had this problem?