Anyone having to monitor their sugar because of some “rapid weight gain”?

Long story short, I had some issues with my sugar in the beginning, but it leveled out. I passed my one hour with flying colors. Had an appointment today and apparently I’ve gained 6 pounds in 2 weeks (I’m very petite, weighed 113 at beginning and weighing in at 136 now, all belly). Doctor is concerned I may have GD, so for the next two weeks i have to monitor my sugar after meals.