amigababy I'm lapsed too! I couldn't handle pregnancy and vegan ism... Dominos was calling my name!
I found meal planning to be absolutely essential (in both low sugar and vegan ism) I would cook all my lunches and dinners for the week in advance, so that I could ensure I wouldn't lapse! On the iron front, plenty of leafy greens and lentils are essential! I used to make a spicy peanut butter curry and basically shove aload of ingredients in a pan to simmer, such as can of chopped tomatoes, can of coconut cream, tablespoon peanut butter, scotch bonnet chilli, quinoa, green lentils, mushrooms and once it's cooked I'd put them in 5 portions of Tupperware with aload of spinach or broccolli (raw) on the top. When I'd microwave the meal when I was about to eat it, it would lightly cook the extra greens too.
Ladies, can I make a suggestion to you all? Don't go over bored with everything instantly, cutting out sugar is really difficult and you're setting yourself up for fail if you plan to restrict everything instantly. Make small changes. Aim to be sugar free or even 50% less sugar by March.
ALSO DO NOT STARVE YOURSELF AS A FORM OF DIET AT THE SAME TIME... It's just guaranteed failure! In fact, the more full you feel, the less likely you are to jump into the biscuit cupbored.
Here's an example of what I eat on a daily basis...
(8am) 5 whites and 3 yolks scrambled with 100g steamed spinach, 4 cherry tomatoes and half an avocado, followed by 20g oats cooked in water with 50g blueberries and cinnamon.
(12pm) 150g full fat greek yogurt, with 1 chopped banana and 20g sunflower seeds on top.
(2pm) Half a bag of salad leaves with half avocado, chopped pepper, cherry tomatoes and dressing (apple cider vinegar, lemon, Himalayan salt)
(6pm) 40g (dry measurement) of black wild rice, 150g quorn chicken pieces and 3 cups of steamed spring leaves.
(9pm) sun warrior vanilla protein shake with water or almond milk
You honestly will not put on weight eating like this as the food is all clean and healthy, you'll feel FULL, you won't have sugar cravings and if anything you'll lose weight.
If you're aiming to cut out fizzy drinks, try to make an alternative.... Like fizzy water with lemon and lime squeezed in (i usually drink that with vodka... When not pregnant!)
Bake your own cakes and biscuits. You'll actually find that you can reduce the sugar you are supposed to add by around 1/3 without noticing end difference initially. Or you can add dates and bananas to make it sweeter!
Generally side effects are going to be you absolutely gagging for something sweet, but hold firm, it's only a few days you'll feel like this!