Candida is a yeast infection and it will 'feed' off sugars, as do all yeasts. If you are feeling ill after eating sugars its quite possible that you are going very high, then having a reactive hypo, i.e. producing lots of insulin to deal with the sugar, then dropping really low afterwards which would make you feel ill. Also, the large swings from low to high and back again will make you feel bad. I strongly suggest that you get a meter and test yourself. Test before you eat, then 30, 60, 90, 120 mins afterwards, and record what you ate and what the levels are. However, i would strongly suggest that you stop consuming vast quantities of sugars (not just the sweeties, white stuff, but also breads, pasta, potatoes, rice, sweet cereals etc) these are all carbs, they turn to sugar when you digest them. It is these that will raise your blood sugar reading, they will also make you very hungry very quickly after you have eaten. Its possible that you have some sort of glucose disregulation, but feeding it with sugar will make it worse. Also, if you have a meter you can test yourself when you feel like you are hypo and see what the reading actually is, its quite possible that it isn't actually that low, also your body should naturally correct a low by itself. If it is really low i.e. in the low-mid 2s then eat something sweet, but not too much, you only need a little to correct. It is possible to go really low after exercise. If you are inclined to go low, then get yourself a proper nutritious meal of protein, fats, and vegs, not sweet things.