Has anyone had symptoms when giving up sugar and carbs? I'm pre diabetic so have completely cut out sugar and simple carbs in my diet. It's a complete change. So far I've felt dizzy, anxious and now I keep having very vivid dreams/nightmares. I'm so tired! It's only day 5! Has anyone else experience the same? How long did this last for you? Hoping it eases off. The anxiety I'm finding the hardest I think.