I had GDD in my pregnancy and did feel like it hung like a cloud over the rest of the pregnancy. I wasn't able to keep my sugars under control even though I was incredibly strict with the diet (I only put on just over 1 stone through the whole pregnancy). If you do have to go onto insulin, you do get used to it, although I hated it at first.
Even though I was doing fine with the insulin and bump size I was induced on my due date - BUT i am in Australia and they are very very conservative with their treatment over here. They basically said that they pretty much have no stillbirths as they like to induce every diabetic woman on or before due date and monitor etc.
I was monitored through labour and did have insulin through my drip. DS then went into foetal distress and I had a carefully managed EMCS.
DS was then tested for low blood sugar and did have this, and continued to do so for the next few days. I was expressing and he was syringe fed formula.
Why am I telling you this you may ask? Well, because basically I had everything go "wrong" that you could ask for! Induction, distress, EMCS, formula feeding - BUT it was fine. DS thrived, was breastfed (albeit bottle fed as he wouldn't feed but I don't think that was related), the EMCS was totally fine, I bonded straight away, it was all fab and no drama at all.
So even if everything does go "wrong", it doesn't mean that you'll be a wreck afterwards.