I am registered with the NDSS as well...you will be referred to a Gestational diabetes education session with a diabetic educator nurse and also a dietician. It is important to keep an eye on your carb intake, though we all have blow outs at times.
I have a Verio One touch machine that l use 4 times a day to check my blood sugar levels. I take two tablets of metformin in the morning. Like you i am heavier this time around but i have lost 4kg just by the metformin. At night time i take a fast acting insulin before dinner then after dinner i take a slow acting one which i inject into the side of my belly. I see the diabetes educator every couple of weeks and a specialist as well as my antenatal appointments so there a few appointments to go to. Also you will have ultrasounds to measure baby's growth...you may not need medication and yes, it can be overwhelming. When i found out this time that i needed to inject myself every night, I was a bit stunned, but I'm a pro now lol. You will be ok x.