PKU screen

Ladies, I need your help!! Wondering if anyone has gone through the same thing or know someone who has. We got a phone call from our pediatrician today... she said our son’s PKU screening came back borderline. It was 4.4. She assured me up and down that most likely the repeat will come back normal. However after every single thing we have been through.... cannot help but worry. Has anyone gone through this or know someone who has had a borderline and come back totally fine? Please help ease my mind in this long week wait for results. Thanks guys 💔💔