I found the low carb diet really hard, I did it for a while, and like I said, lost a lot of weight (DS2 baby weight, about 3 stone) but it didn't stay off because it is pretty impossible to go through life without carbs.
By all means don't eat empty carbs, and cut down other carbs, but IME the easiest and longest lasting way to lose weight is by drinking more water, cutting out snacks and slowly exercising more, if it's done slowly it becomes normal, rather than a 'diet' that you have to stick to.
If you get your body used to eating less, you get less hungry, and don't pig out as much,
Also agree with the sugar thing, I never used to eat chocolate, ever, I wasn't a fan of sweet things, but when pg I get HG and can't keep anything down so for the first six months practically live off coke, which in turn leads to me eating cakes, and chocolate, and sweet etc, when I don't drink the coke, I don't fancy sugary things at all.