High Blood Sugars

Hi, I am one week post op, RNY. I'm doing pretty good, able to tolerate protein shakes 3x day, soft foods-pudding, mashed potatos, the gas is over-for now! I am surprised that my blood sugars (diabetes II) are still averaging 220 - 280. Does anybody have any suggestions for the best foods for optimal sugars? I have not started walking yet, but today is the day!