With diet you probably won't get in to much faster then you normally would. What would work is to burn of fthe glucose that is stored. Instead of eating just meat, try KISS for a few days (meat, LC veggies and fats, no dairy LC foods or so on) and lift weights. Don't exercise the same muscle groups 2 days in a row. So maybe after the glucose test do legs that day since they are the largest muscles. The next day work on arms, then back tolegs and so on for the week. This way the sugars will be used for fuel and burned up faster.

You're not taking the glucose test because of pregnancy are you?

You never know, maybe a shot of pure sugar will be just like a refeed and get things started well for you. That or giv eyou the mother of all tummy aches