Signs of gestational diabetes?

[Leleophants]

When do they test this? I've never had any of the risks but lately I've been so exhausted and drinking so much water (2 litres just through the night) my sleep is terrible.

Do you think this is a sign?

It could be. Although tiredness / insomnia and increased thirst are also pregnancy symptoms generally. If you have glucose in your urine sample that's a symptom, as is measuring large. I had glucose in my urine and was given the GTT at 28 weeks although it came back clear and I'm measuring fine. They don't do it as standard in my area. If you're worried, call your midwife and discuss it with her.