new here and desperate for some advice and support

firstly hello to all and congrats on being pregnant.
i was diagnosed with GD at 28 weeks and im now 33 weeks. my care since diagnosis has been very fast moving. i started with a week of blood monitoring, and all my levels were really high desite a low carb, low sugar diet. i was then put onto metformin 2000mg a day and was on this for 2 weeks, with really very little improvement on my levels. the nurse then explained my diet was fantastic and it was not anything i was doing. in fact my diet was so good i was actually losing weight. despite this my baby is measuring at last growth scan at 32 weeks as 7.5lb. way above the 98th centile and on target for a 13lb birth weight. so i was put on insulin.
i am cureently on humalog 25/75. i started on 8 units am and 2 units pm and have gradually gone up to now 16 units am and 8 units pm. with an increase by 2 units again tomorrow as my levels are still normally in the 10's or 11's. i have a teleclinic with my nurse every tuesday and do not see the full team again until the 11th june when i will be 36 weeks. i have been told that i am ok to go to 40 weeks to try for a natural birth as i have had a previous cs so they dont want to induce and i would like natural if possible. my worry is though that if i do keep getting high readings surely this means its not good for my baby?!
the nurse doesnt seem too worried and yet i am very concerned. this has been traumatic for me from the day of diagnosis as i am needle phobic in the extreme. i have done everything they asked of me, but i feel they are ignoring my concerns now. i have even had to have a stay in hospital as they thought i had diabetic keytosis (spelling?) and i need to have artiiral blood gases done which i ended up needing to go into HDU for as my blood pressure and pulse went too high due to my phobia. the only way i calmed down was to breath gas and air!

so a few questions. should i consider asking/telling them i want a sweep (the only way they will consider inducement) at 37 weeks and then give in and go for a cs? how much insulin can i take in full, ie how high will they make my units safely before they change my care plan? is this harming my baby by them ignoring my levels?

thank you so much for replying. my other 3 boys were born at 42 weeks weighing 9lb 2oz, 9lbs, 4 oz, and 10lbs. no GD detected with these pregnancies. i feel that because my others were naturally big the dr's feel this baby will be bigger anyway and i can do it fine. im not against giving birth to a big baby nor am i suggesting i want to have a preterm baby, but they just seem so relaxed about it. mind you my dr's are all male so maybe that why they arent as worried! one dr even said 'oh you can deliver a 14lbs baby fine!' not funny at all if it was a joke!

thank you again for your support. i have been trying for the last few days to contact somone/anyone with regards to my insulin and getting nowehre. my levels are still around the 8-9 mark and sometimes higher despite the humalog and metformin and a good diet. my nurse isnt answering her phone so i rang the main board and was told some of the phone system is down and i should wait for her to ring me. then i tried my own mw but she said to ring the clinic, so i rang the clinic number but they arent there until tuesday! its madness. i cant up my units without the ok from someone and while im waiting for someone to get back to me my little baby boy is piling on the weight