Niamh - I was asked to take my levels on day four. If the levels were ok (same sort of limits as GD) then to just make my 6 week check where dr will give me GTT form to do (but I think I'm having mine between 6 and 8 weeks). If the levels were high then I had to make an app with dr asap.
Luckily mine were ok. I have my 6 week check monday week.