Hey KamKol,
I am having a GTT due to my BMI being over 30. MW booked me in at my 20 weeks appointment, i go in at about 26 weeks i think it is.
Apparently Diabetes through pregnancy is through wieght more than genetics. But have you had your 20 week apt yet? if not then ask MW then.
they will do a fasting blood sugar test first you just starve yourself from 12pm the night before i have mine tomorrow at 8.30am
you can book with your doctor and ask them to do and get the result if its under 4.9 dont worry over 4.9 contact your antenatal clinic at the hospital and tell them you need to do the GTT but your BMI is fine they only do them when your bmi is over 35 your bmi is pretty good though x