I'm too afraid to eat after failing glucose tolerance test.

I am freaking out. My score was 152 and my doctor said that was well above the 135. I feel like a horrible mom. I read a lot about diabetes how it's not safe to go over 140. 
I have already been restricting eating, I count calories and only eat 1,300 calories a day. I have gained 10 lbs and I'm 28 weeks pregnant. I went from 120 lbs to 130 lbs at 5'6. And at am I doing wrong. I feel like I eat too much now and gave myself diabetes . I'm scared to eat now and have bad health anxiety because obviously my body couldn't handle a simple drink!
I fasted all day and my appointment was at 3 pm and my body still couldn't do it😭