Take a deep breath!! It's going to be ok!
I had GD with my third pregnancy (first and second were fine) I ate well and was physically healthy. It is something that is just out if your control.
However I was adamant I would just be diet controlled and no induction what so ever for me after two spontaneous drug free and fast vaginal deliveries!
And that's exactly what I got! Diet controlled and yes it is a pain in the ass glucose testing before and after meals and watching what you eat but it also was a healthy learning curve for me. I didn't realise that carbohydrates turn into sugar so you must watch the portions you have when you eat rice and pasta, cereals, bananas just to name a few. Watermelon I love love love but it is very high in sugar so I had to limit that!
Anyhoo I refused induction and hospital policy was if you weren't insulin dependant then you can go to 41 weeks. I went that far didn't I.. I was booked in for an induction on the Friday morning after I had consented and realised the health of my baby was more important than my issues with induction. Bubs must of known and at midnight the night before induction my waters broke and 3 hours before my admission time my third bubs was born!!!
So check your hospital policy on GD mothers gestation periods and really educate yourself on what you can eat! Smaller meals but more often was the key for me!!! Good luck with the journey!