You can have carbs, but you may not be able to have gluten if that is what made you gain. You will just need to introduce one carb at a time to see how the scale treats you, and have treats on occasion. That said, I feel so good now not eating everything I used to eat that it does not even cross my mind. I started the same way though: I want to be able to eat pizza and ice cream on occasion. The idea of not being able to was not appealing at all. Now, things are so different! So give yourself time. It will all be fine.