31 + 5 weeks and JUST now.....

JUST now finding out, after a week of finger pricks all day, that I have Gestational Diabetes. Gives us a reason why my baby boy is already 6 lbs and measuring in 5 weeks ahead! But I’m totally bummed that this is even happening. I have only gained 17 lbs and was proud, but now I feel like this is caused by something I did. I’m so mad at myself that this is happening, but why? What did I do? Anything? Any other ladies feel this way?