Nuts
High calorie dense foods. Protein shakes are good too
Protein shakes , tuna , eggs
You could add nuts to your snacks. You could also mix a protein shake with the milk you use for oatmeal or just drink one separately.
Since you can only have protein I would either scramble some egg whites to eat alongside the oatmeal in the morning or add some more chicken to the dinner! If you have a protein powder you can mix a scoop with water and call it a shake! The powder will prob have a couple grams of carbs and fat but it won’t put you too much over 😊
do more chicken at dinner, a protein powder before bed, or add protein powder to your yogurt/oatmeal
Low fat yogurts, low fat cheese, protein shakes
Eggs!