Yes, I did a sugar detox. I told myself I could eat until satisfied but had to cut out all sugar. I drank a lot of water. I think that sometimes, when I was craving sugar I was just thirsty.
I stopped putting sugar in coffee, stopped eating sweets, and I started exercising. The fatigue I would feel and then eat sweets and drink coffee to combat it in the afternoons disappeared. I started to feel more energy from working out and didn't need to eat sweets to feel alert.
All the best!
ALSO, there is a spark team Official Sweet Tooth Challenge that might help you as well