Thanks guys - good to hear your feedback. The reason I asked is that I am around 6 weeks pregnant now. Last couple of nights I have been back to waking to pee hundreds of times and super thirsty so started checking sugars before and after again as I did with 1st pregnancy. (1st pregnancy was on inslulin to manage sugars). and sure enough my fastings are sitting around 6.5 and 2 hours after a meal at 9-10 which I think from memory was too high!
My GTT after DD was born wasd normal and I have had normal random sugars in the last 9 months since she was born so am pretty sure all this has just started again since I got pregnant again. However I was under the impression (wrongly obviously!) that GD didn't start until the 2nd or 3rd trimester!
Guess will try and see the doc next week. 
Thanks for your help.