I'm currently 38 weeks and 3 days. Up until my last appointment (December 28th) I was measuring perfectly. Now it seems I'm measuring 3 centimeters behind. The doctor wasn't sure why so she scheduled me for an ultrasound on Wednesday (January 5th) to check babys growth. If the baby is measuring small, she will schedule me an induction for the following week or late this week. It could just mean he's entered th birth canal, which I strongly think has happened. My question is, should I worry? And would this mean my DD has been off for this long? All my dates made sense and past ultrasounds matched up. I'm just worrying.