Whenever you realize that doesn't work, commit a month or two to fully breaking your sugar addiction. No sugar, no grains or grain products, no veg oils, basically just eggs & beef. Brain fog & sluggishness & other potentially even flu like withdrawal symptoms will be rough for a week or two. But after a couple of weeks you will wake up one day feeling more grounded & clear headed than you've ever felt in your entire life.
Someone telling you to eat more sugar to solve the problem is like a smoker saying you just need another cigarette to relieve your stress. It's only going to make the problem worse.