Well, you do get carbs in Phase I from the veggies, beans, and dairy. But you do not have any grains or fruit. Since you are diabetic, you definitely do need to do this under your doctor's guidance. So make sure you ask him your question.
For what it's worth, following the diet has done amazing things for stabilizing my diabetic DH's blood sugar levels, but he did not do Ph1. He just eats what I eat to give me moral support, not to lose weight. He is already thin.
It's great that you lost 74 and were able to keep so much of it off. Glad to have you with us on the beach!
Life's a journey, not a destination.
It's easier to stay on plan than to get back on plan.