C.O.
I have never had problems such as these. But perhaps it is a perspective re-focus that you need. If you end up passing the glucose test a second time, great news! But since you had GD the first time, I am sure that your doctor wants to be extra sure this time.
It is an inconvenience, but medicine is rarely an exact science. If your doctor misses a diagnosis it would be awful for you and your baby.
As much as I hate receiving this advice myself, chill and take the test. better safe than sorry.
BTW-take my own glucose test for my second in 3 weeks.
Good luck