I have gestational diabetes 😞

I failed my three hour test and now I have to go to a dietician and monitor my sugar levels. I feel so depressed about this diagnosis. I feel like it's my fault. I was 128lbs before getting pregnant. I have continued to work out 3-4days a week. I eat okay, I'm not a rockstar by any means but not a train wreck. I just feel so sad. I'm just worried I won't be able to control my levels. I just really wish I didn't have to deal with this. Any other moms with gd feeling like this?