Small Abnominal circumference 28 weeks pregnant

Stjd

So I went to my ultrasound the other day and they told me oh the baby is measuring mildly on the lower side of the abdominal circumference and head , on the 10th percentile .

Should I be concerned or the baby is just a small baby and will eventually grow out of that? What are the risks? Could this have anything to do with the failed abortion I did ? I’m on insulin, my diet is meh as I’m so busy with nursing school I sometimes to eat. .. I don’t sleep well.. I’m just all over the place cos I’m puzzled!

Anyone /someone who had similar experience pls help