I have no advice since I'm not familiar with GD but I do remember being very concerned when I failed the 1 hour and praying so badly I wouldn't fail the 3 hour. So I'm sure you're feeling so very bummed and concerned all rolled in one. I'm sorry for that!! The one thing that resonates through your postings has been that you have very good people looking after you. That goes sooo far and I'm sure your doctors will be watching you very closely and can react quickly should any concerns arise.
Sounds like you've gotten some good GD advice here too and I hope that you can get this under control super fast.
Hang in there!!