Struggling with gestational diabetes diagnosis

I found out Friday that I failed my 3 hour glucose screen. The nurse said someone would be calling from another office to schedule an appt with me, I imagine a dietician of some sort. I feel lost, despite my research and talking to others. I don't feel like I can eat anything I used to and even hesitate to eat whole grains because the carbs are so high in them. I am stressed out not knowing what to expect or what my sugars are running, and I haven't heard from the doctor. On top of all of the confusion I am upset that I can't have some of my favorite comfort foods and knowing that GD increases risk for type 2 I feel like I will never be able to enjoy them the same way again. I literally cried while filling the candy bowl for trick or treaters because I couldn't have a piece or two. I feel legitimately depressed. And then I feel bad for feeling so bad about this because I know it could be worse and I want my baby to be healthy, and I know that's what should matter more than anything. I just can't get over the frustration and confusion and just overall sadness I feel. I know that probably sounds ridiculous, it's just food. But I don't know what to do to feel differently ☹️️