With my first baby I had no idea when I fell PG, had a dating scan to determine my EDD.
I measured 2 weeks ahead from about 24-26 weeks, she was born 2 days past her 'EDD' and was definitely overcooked.
My next 2 pregnancies both measured pretty much spot on, DD2 was all over the place from week to week.
Unfortunately it might mean something & it might not, there's no way to tell. Like the others have said I wouldn't worry too much about it - unless you're worried about going way overdue? In which case you could ask for monitoring to check on bub, they will usually be happy to do that for you in the later stages.
HTH