Last night I had an episode of low blood sugar and felt really sick.

Yesterday I ate...

An oatmeal (150)

My lunch consisted of:
Half a serving of blueberries and strawberries (65)
A serving of carrots (25)
A cheese stick (70)
Half a serving of turkey pepperoni (35)

For a Snack:
A Banana (105)
and half a zucchini (15)

For dinner I had:
Boca burger w/ bread and ketchup (150) and half a serving of blueberries and strawberries (65)

For a Snack
1/2 a zucchini (15)

And when I came home I had
A salad (70)

And then after my salad I started feeling the symptoms of low blood sugar, and when I told my dad he told me to eat some protein, so I had a small portion of turkey pepperoni (35) and a chocolate bar (220).

I know calorie-wise it was way, way, under my normal intake. I usually have 1100-1300 calories but it felt like I ate more than I did.

I am wondering if to prevent low blood sugar do I need more sugar in my diet? And how do I do that without over-extending my calorie intake?