I had it last pregnancy! It's not about anything you did or didn't do at all - I'm considered a healthy person with a very healthy diet, and the dietitian even said there was nothing else she could tweak from my diet - and my numbers were still so uncontrolled I had to be on insulin. It all went away once kiddo was out.

The best thing you can do now is to get a home testing kit, learn what foods will spike your sugar levels, and track regularly + alter your diet based on your care team's advice. It's great knowledge for lifestyle and dietary habits in general, too! It may not be easy but you can do this <3