What Newquay said, if you can have protein snacks with some complex carbohydrate you feel less hungry for sugar, especially if you keep trying. It may be difficult for the first few days then your body will begin to rebalance.
If you do eat chocolate try dark and have a bit after your protein and vegetable rich meal, that way it does not set up cravings so much. If you have it with a hot drink even a little bit feels like a lot.
Some small snack examples: cottage cheese or houmous/ryvitta or celery or chunks of green or red pepper or some carrot pieces
plain greek yogurt with some seeds nuts (dessert spoonful of seeds)
a small apple and about eight almonds
egg with one small piece of brown toast.
Small piece of left over omlette and an oatcake.
One heaped teaspoon of peanut or almond butter on an oatcake or ryvitta.
Have some good oil every day or good fats in nuts seeds and avocado but do not over do it.
Piles of green vegetables with your other food help you feel full and are full of vitamins.
Meals: chicken/other protein and a lot of green vegetable a small amount of brown rice or boiled potato or quinoa.
Breakfast porridge with some milk or else some seeda
two eggs and a piece of toast
Sugar free (lots-of-raisin free too as raisins can be very sugary) nutty granola not too much
Plain Yogurt and seeds, some berries or apple cut up or about eight grapes
Not orange juice
Walking with your baby.
You should not need to count calories with this sort of food and walking around with a oush chair or a carrier.
The only danger would be too many nuts, too much brown rice etc
Do not get too hungry or lose to much weight a once though!
Have a lovely time with your baby.
Congratuations