Ahh ok, that does sound likely then. But try not to stress too much, I imagine due to when they schedule tests, lots of women have had GD for a while before they test.
Me included! And then I had uncontrolled fasting numbers for a long while after being diagnosed too, so if it takes a few days to hear back from the midwives, try not to worry.
My now 2.5 yr old is perfectly healthy and their sugars were normal at birth!
Sounds like you are doing everything you can in trying to make changes to your diet! And that will be the first step they ask you to do anyway!
There is a GD network, which you have to subscribe to to get full benefit, but has so many GD friendly recipes! Including some amazing GD brownies!
But I think the key thing is around pairing carbs, so always make sure you are eating a protein with any carbs / sugar. E.g peanut butter and apple, banana and yoghurt, nuts with some dark chocolate, toast with peanut butter / avocado.
and swap white foods (potatoes, rice, pasta, bread) for brown!
Good luck!