Hey there, yes it's confusing when you get all this 'techy' information and it's contradictory. I think sometimes it's best to listen to a good old midwife who just takes a fundal measurement, tells you that your bub is doing fine and that bub will arrive sometime in the next x weeks (depending on your EDD based on LMP or early scan date). I wouldn't put much stock in any updated EDDs based on scan, as they are inaccurate, work on averages (your bub could just be a littley or a biggey) and don't take into account that it is your bub that decides when he/she is fully cooked and ready to appear.

Stop worrying and stop putting too much stock into doctor's opinions! After all, even the top OBs cannot accurately predict the arrival date of babies (unless they are doing an elective c/s ).