Hi there.
Yes, I totally felt the same as you, so you're not alone. I was diagnosed at 17 with type 1 diabetes (22 years ago). I bumbled through the first few years with not a lot of knowledge about carb to insulin ratios and had a terrible hba1c, of 8.5 to 10 percent.
When I was 23, I went on the DAFNE (dose adjustment for normal eating) week-long course at my local hospital and it was a game changer for me as it was the first time I truly understood how to manage my condition. I think education is a bit better now, but back in 1996, where I lived, it wasn't that great.
Anyway, I worried about kids in the future too, because of my control. When I was 29, me and my then-boyfriend (now husband) started talking about children and I worked hard for a couple of years to get my levels down to 7 percent ish. I was put on an insulin pump to help, then in 2013, I had a lovely, healthy baby boy, weighing a lushious 9lbs. Last week, I had a healthy baby girl, 8.7lbs.
So, please don't be put off. Sure, it's hard. And yes, there are complications associated to badly controlled diabetes, but you'll be amazed at how focused you can be when you want something badly enough. The care you get and monitoring throughout, in my experience, is great too. I also know two other type 1s with healthy babies, plus a few friends who had gestational diabetes and their children are all fit and well.
I mentioned I was looking to start getting my levels better and potentially start trying when I was at clinic ten years ago, and I they arranged for me to have a chat with a consultant at the antenatal diabetes clinic which helped lots too, so maybe that's an option?
Thanks.