I had gestational diabetes throughout my pregnancy and my little boy was born of normal weight and with no problem. I had to test my sugar levels after every meal and try to limit carbs and sweets as much as possible. Lots of water and don't stress. Not long left and you will have your bundle of joy in your arms. The diabetes goes after you give birth. Best of luck!
There is a Facebook page called gestational diabetes UK that is pretty helpful ☺️