All I can tell you is that I was insulin dependant with my son and had GD. He was also delivered at 34 weeks. He was 6 weeks early and my doctor never did an amnio. All they did was an ultrasound and set me up for a c-section, as I also had preeclampsia. I would question about the lungs. They are usually strong enough by now. It just does not make sense to me, but I'm no doctor either. I do know that because of c-section infants do have a bit of trouble breathing moreso than vaginal births. My son had a little bit of trouble, but NOTHING to worry about. He was also a bit jaudice and had to have an iv himself because once they cut the placenta, the sugar is cut off to the baby and sometimes they can get low blood sugar, so I guess they give them an iv in case? Anyway, I'm sure you will have more than one doctor in the room when you deliver. Usually the have a few nenatal doc's in there prepared if a woman has had a high risk pregnancy. Everything went great with me. My son is a healthy 7 year old little boy now and I would do it over again in a hearbeat. Actually, I may be doing it over soon. Best of luck to you, and again, ask the doctor about why the amnio is so important as to the delivery or is it possible that you don't really need it. Some doctors, not to say all, are a bit greedy and will run any tests for money's sake.
Best of luck!!!