Many find the first three days the most difficult to get through with three shakes a day and the one protein + non-starchy carb meal for tea.
Make sure you keep you water intake up, herbal teas can be great for a bit of flavour, also soda water with a squeeze of lemon or lime.
If you are really struggling with the timing between meals you could always split your dinner meal in two (2x 50g of protein and 1 cup of non-starchy veg) and have these at separate times.
If you really do need something to nibble on then your best option would be non-starchy vegetables; a tomato, couple of radishes, cucumber, celery or capsicum- these are all low calorie options.
BT Nutritionist 🙂