In the States I believe it is standard to have GTT (a 1 hour test) towards the end of 2nd tri/beginning of 3rd tri, but pretty much always by 28 weeks. Failing that, you are giving a Glucose Challenge, which involves a more concentrated drink, and is a 3 hour test with a fasting and then hourly blood draws to track the progression of blood sugar.
I was borderline on my GTT with #1 and #2, and was completely surprised as I have tended hypoglycemic my entire life (low blood sugar issues). With #3, I realized I had symptoms but only after failing the GTT, and waiting for the challenge. I was still very surprised when I failed the challenge. My symptoms were excessive thirst and debilitating fatigue after meals. Both of those are hard to distinguish from the increased thirst of pregnancy, and the increased fatigue!
This time around, I was fairly sure I would fail and that I was developing GD as I could tell the thirst was increasingly bad, fatigue was noticeably worse if I had high carb meals, and my mood swings seemed to correspond to the level of sugar I was consuming. I wouldn't have noticed any of that if I hadn't previously experienced GD though.
I would think GD is definitely a possibility for you, but even though they don't do the GTT by routine, they are doing urine checks each appointment, right? So if you had uncontrolled GD happening, presumably there would be sugar present in your urine too, and that could be a red flag. I just don't know enough about how things work there. Would they give you the test if you asked?
I was borderline on my GTT with #1 and #2, and was completely surprised as I have tended hypoglycemic my entire life (low blood sugar issues). With #3, I realized I had symptoms but only after failing the GTT, and waiting for the challenge. I was still very surprised when I failed the challenge. My symptoms were excessive thirst and debilitating fatigue after meals. Both of those are hard to distinguish from the increased thirst of pregnancy, and the increased fatigue!
This time around, I was fairly sure I would fail and that I was developing GD as I could tell the thirst was increasingly bad, fatigue was noticeably worse if I had high carb meals, and my mood swings seemed to correspond to the level of sugar I was consuming. I wouldn't have noticed any of that if I hadn't previously experienced GD though.
I would think GD is definitely a possibility for you, but even though they don't do the GTT by routine, they are doing urine checks each appointment, right? So if you had uncontrolled GD happening, presumably there would be sugar present in your urine too, and that could be a red flag. I just don't know enough about how things work there. Would they give you the test if you asked?
Any improvement at all now would have resulted in even lower numbers 2 weeks ago, and so on. At least that is what I have convinced myself of 
I'm a HUGE butter fan, so I suppose I should be thankful that we don't have to eliminate that too!
