Gestational Diabetes

So I got “diagnosed” 2 weeks ago with Gestational Diabetes (Not really they just said I didn’t pass my 1 hour and that it was high so they want to start me on the diet as if I have it) is it normal to not do the three hour? I am on the heavier side, but I’ve only gained 4lbs my whole pregnancy this far (29

Weeks) even with my first I failed the one hour and they had me so the 3hr and passed. This is a different dr and I don’t know if I like him so much. He’s very different than my last that’s for sure.