Hi @Tara16,
I’m 38 weeks on my 4th child/pregnancy, 2nd T1 pregnancy. For both my T1’s I’ve maintained an a1c of 5.7-5.9. Its totally doable as @yourhanner mentioned. It feels like a mountain before you, a daunting task, but believe me you can get through this successfully. Now, I see a high risk doc and my endo but I’m 32 yrs old, I had my first kid when I was 26. The age is different but not much else is. 
I didn’t eat low carb, I would call it medium carb 
and I am still able to keep my BGs in check.
I have one boy, two girls and one baby gender surprise- although I think its a boy. My 1st T1 baby- she was 7lbs 7oz, healthy as can be. She came out at 39 weeks induced. No hypoglycemia at delivery. My biggest baby was 8lbs 13oz but that was before I had T1. All my kids, no matter their size, have been very healthy.
I don’t focus on how much weight I gain, I focus on how much weight the baby gains. I end of gaining more than baby, but breastfeeding cuts a lot of that out later. From my experience, for diabetic mom’s it takes longer for the weight to come off the older one is. Remember, it takes 9 months to gain all that weight, it will take some time to get it off.
As for the comment on insulin resistance, yes it will happen, not if but when. I went through bouts of IR at the end of my 2nd trimester and some in the 3rd. Its mostly due to the hormones and other goodness knows what produced from the placenta. Yes, diet does have something to do with it, but very little compared to the placenta. You will find this to be true when you finally give birth and your blood sugars go back to normal almost immediately. Once that placenta is gone, you are in a better place to control BGs with diet and insulin.
IR is normal in pregnancy, but you still need to try to get ahead of it, behind it, don’t give up trying to bring your BGs down. I have had moments when I felt like I was starving myself too. An occasional high will most likely not cause you to miscarry or cause fetal malformation. Its really good to keep your BGs in range but don’t let the worry go overboard. You need consistent highs, uncontrollable BGs to do that. The thing to focus your energies on is the amount of time it takes to come down from a high. I would get highs but I came down quickly. My drop rate was good to the point where my doctors really weren’t too concerned. Its if you have highs and you are staying high for long periods of time. When that happens, you also need to look at dehydration, potential DKA, which is serious enough when not pregnant but doubly serious in pregnancy. If you aren’t on a pump, doesn’t matter the make or model, get one. It will make managing your D during pregnancy so much easier, mostly for you but also for your doctors. There are studies concluding that women on insulin pumps need/require less insulin during pregnancy compared to those not on insulin pumps. Less insulin means potentially less weight gain for you and baby and potentially less bouts of IR.
This is all I can think of for now.
Best wishes with your pregnancy! 
Busybee
