Wrong due date possibly?

Brittany

I understand the whole due date is just an estimate, however I am 30 weeks, and when I went to my ultrasound yesterday so they could measure the baby he is around 5 pounds already? His growth his perfectly fine and he’s got all his little fingers and toes etc... baby is head down and preparing himself for birth. I have had some thinning out but nothing extreme. I have no risk factors for early labor, or anything that could cause baby to come too soon. Just curious to see what other mommas think..? This is my second baby, my first one I actually went over a week and had to be induced.