Anna I have failed the GCT in the past and passed the GTT so don't worry. Don't forget too even though it was only a slice of toast, bread is a high reader with carbohydrates so would have pushed it up a bit.
My OB now sends me straight to the GTT and no GCT beforehand. I had a borderline pass this time round but because my fasting level at the start was 4.8 they are not looking too bad at the 7.2 at the end of the 2 hrs. On my glucometer at home the 2 hr reading came abck at 9 so I was freaking out ...
Even if by some chance you do end up with GD it is not bad at first as you only need to follow a stricter diet. It only gets to be a bother if the diet doens't work and you end up with high readings all the time and end up on insulin. To get that bad though is very very rare.
hugs hun
Jude