Big baby?

We had our anatomy scan today and they said everything looked beautiful! What a relief. However, they did tell us the baby was measuring big, 92nd percentile big! I am 21 weeks and will be taking a glucose test in a few weeks. They said not to be concerned, but I am a little worried maybe it could be due to gestational diabetes…? I am not overweight and lead a pretty healthy lifestyle, though I know GD can affect anyone. Has anyone on here ever been told they have a big baby around this time and it *wasn’t* GD? Did your baby’s size have any bearing on their birth and how difficult it was? Just curious if all the different things this could mean and what the outcomes could be. Any advice/personal experience is appreciated!