Baby measuring small

Katie

I’m 33 weeks and went to have a growth scan this afternoon. I had covid at 31/32 weeks so they wanted to do a growth scan just to make sure things were ok. I didn’t get covid that bad really just felt like a bad cold. So I went in today and the doctor is concerned that my baby is measuring smaller. When I had my scan at 24 weeks the baby was measuring at 43% but now she is measuring at 25%. Her femur and head are smaller. Has anyone had this happen? They are referring me to a specialist but I’m worried.