What affects fasting numbers?

Monica

Hi all ! Yesterday, at after dinner, my numbers were within the limit. Before bed, i had a piece of toast with peanut butter and a nectarine. I woke up to 99 on my fasting number and i am not sure whether it was my sleep or the snack i had b4 bed. I am wonder what sort of things you have noticed have triggered your fasting number to go up?