Sounds like sugar really spikes your blood glucose, then after a while, the bottom drops out and you become hyperglycemic, which is too low blood sugar
. You should try to eat things that won't raise your blood sugar
quickly. That means avoid anything with sugar, white flour, white rice, processed foods, etc - anything with simple carbs, including fruit; if you're going to eat fruit opt for apples, pears and other very high fiber fruits.