Retaking GD test weeks after passing it?

Ebeth

So I passed my Gestational Diabetes test at 24 weeks. I'm now 33 weeks, but recently I have been incredibly thirsty (drinking 120+ ounces of water a day) I have also had some other symptoms. So my doctor ordered a second test just to make sure I don't have GD. Has anyone else had this? I haven't heard of anyone passing the first test, but developing it later. Anyone with a similar experience?