Ultrasounds and accuracy

Jena

So I’m not looking for any expert opinion or anything just advise or stories.

Backstory: I’m currently 32w4d in my second pregnancy and since my 20 week anatomy scan babes been measuring 2 weeks ahead and in the 56 percentile. Well I had an appointment with my OB Wednesday for the heart rate and to be measured (which like I said I’ve been measuring consistently two weeks ahead from 20 weeks) well I was measuring 35 almost 36 weeks instead of 32 so she checked my fluid which was healthy, sent me for a NST since he’s not moving too much but that again was normal they just assumed he’s super big and running out of room so they just adjusted his base scale for movements. Well she also ordered a growth scan which I was excited for since there was a chance they’d move my due date. Well the technician I had seemed to be right out of school and it was by far the fastest ultrasound I’d ever had through either pregnancy. Was done within 15 minutes and she measured my fluid and placenta, measured his kidneys and stuff. Only got two scans of babes head and stomach along with one of his upper leg and upper arm bones with the results showing that he’s only measuring at barely 33 weeks at 4lbs 1 oz in the 21 percentile and I’m rather confused and pretty devastated cause I feel like something isn’t adding up.