Firstly don't beat yourself up, at all, about any level or what you are eating etc.
Its hard being diabetic, its hard being pregnant, but both together is beyond! Any medical person who tells you that you could do better etc doesn't know how it is in your shoes, and I would take their advice, but don't take it as a reflect on how much effort you are putting in.
This said it isn't impossible, and some of the more hardly or brave like
@grainger have done it again.
I had no insulin resistance at all, I was always sick with lows, less then 5 and I would be sick. I had to eat and eat the whole 7 and half months otherwise I would spend the whole day throwing up, but not able to get them up again.
I had to test in the night, and eat most nights to stay level.
I ate for England throughout the whole pregnancy, or I was then in the championships for the most sickness in England.
So if you can only eat crisps or whatever else to stop being sick then eat them. It wont cause any harm. And as long as you try and eat varied and do eat the right things to you are fine.
Plus if you crave it eat it, the sales of wheatbix and pork pies went through the roof when I was pregnant, but I just needed then.
And don't eat what turns your stomach, you don't need that each annoyance in your life.
She's now 8 and is perfect, I would do it again for her tomorrow. But not another one haha!
We are here for you, so ask away or moan or whatever, even if we don't know the solution, you are not alone. And we know how hard it is.