Seems like you are on the right track . . . always love it when posters come up with the great answers before I even get here.
Keep those carbs under control (especially the white ones). I know I get that same problem if I over indulge and I do think it is connected to the Metformin going to work on the excess sugars and flours.
Oh . . . BTW . . . Get back to see your doctor and get an appointment with a DEC (Diabetes Education Centre) if you can. You know you cannot control it by ignoring the disease . . . I tried to do just that for quite a few years. It does NOT work. Rant over.