A Bump in the Road

I just got the results from my test last Friday... Gestational Diabetes.

I am in shock - what did I do wrong? I've only gained 13 lbs, I wasn't overweight to begin with, I eat fairly healthy, I exercise... ok not enough but I still get it in...

I know I should be happy that this is the only bump that's really come up so far but I can't help it - I'm so upset that I just started bawling at work.