Options please

I had my three hour glucose tolerance test today, they made me drink 24 oz of the drink, which is 3 cups of the orange drink. I thought that seemed like a lot. I failed all flute numbers were elevated. I've been monitoring my blood sugar even before it was confirmed. I just took my blood sugar and it's 88! I had lucky charms after my apt, broccoli and cheese for lunch, got a which headache so when I got home I had one bread stick and took my blood sugar, it's 88 and I still have such a head ache. I need some moms opinions! If you have been diagnosed with GD what are normal levels, and how am I a diabetic with my blood sugar being that low? Help!