Cheat On a Blood Test?

Being off of Metformin made me nervous with my upcoming gestational diabetes test.  I did the short test and my bloodwork came back on the borderline, so my Dr ordered the long test.  

Ugh...I wondered if there was a way to cheat on a blood test?  I did not want to have to shoot up any more than I already had to get pregnant.  I did my best to cut back on all sugar several days before the test and I continued to walk each evening as I had been throughout the entire pregnancy.  It was as close to cheating as I could arrange.

The long test came back fine!  No shots for me!  And I continued to walk & eat well.