Frustrated! 😭😭

So last week I went to my 34 week appointment and had my ultrasound. They said everything looked good, she’s 4lbs 8ounces. Then I went today and they told me I need another ultrasound next week bc she’s measuring small, in the 26 percentile. I thought 4lbs 8ounces was normal, and I was happy! She kept saying everything is ok but I’m just so worried now. Anyone have any sight cause I can’t stop crying.