10th percentile 32weeks & cord trouble

I am 32+1. Today we found out baby boy is in the 10th percentile overall and is having trouble pushing blood through the umbilical cord. They did 2 non stress tests today and were not thrilled so I did a second ultrasound and baby was doing ok. I have a referral to a specialist at a larger hospital and am going to be monitored twice a week with both ultra sounds and non stress tests. Has anyone gone through this before? Trying to stay calm but very nervous.