Answers - sort of

By this afternoon, I had still not received a call about my glucose tolerance test. I called my clinic again and a lovely nurse took pity on me. She volunteered to call the lab, and then kept me on the line while the lab faxed over my results.
Apparently, the results were deemed "unsuitable" by the lab.
Looks like they bungled my 1h sample. However, the fasting and 2h samples were o.k.
Now I wait for my doctor (not in today, but in tomorrow) to decide whether what results we did get are good enough to determine whether I have gestational diabetes or not, or whether I need to SHUDDER redo the test.
At least now I know when I'll know, you know?