Failed 1hr glucose and panicking

This is my second pregnancy and didnt have GD with my first. But i just got a call from my DR saying I failed the 1hr and to do the 3hr one. I just know I have it because during my scan babys abdomens was measuring 2 weeks ahead and that is apparently a sign of GD.

I just dont know where to go from here. I guess I have to wait and see…