You are going through withdrawl, and itīs normal, it passes after some time. I eat a low GI diet and it doesnt allow for white carbs or any sugar. Your body needs time to process the change, so of course there are side effcts, but when you are dizzing for feeling the crave for supgar or sweets, be smart and go natural. I like to make a milkshake. I take 1 pot of fat free yogurt, 100 ml of fat free milk, and 100ml of frozen berries or fruit, blend it together and it is amazing and only 150 calories. It is super sweet, but natural, You could also cook a pear, pear or apple in the micro until its soft and then sprinkle with cinnamin. There are a lot of sugar free but natural sugars to eat.
Be strong and it will pass. Good luck.