Blood sugar

I am on my third day of a water fast. my blood sugar is at 105, would anybody know why that is? I had one high blood sugar reading a few months ago but since have been monitoring it and it seems to be in the normal range. my question is when waking up from sleep my fasting blood sugar is below 100 but on the third day of fasting my blood sugar is 105. Does this mean I just had an unusually large amount of glycogen in my body? yesterday my blood sugar was at 110 so it is going down its just higher than a waking fast and that confuses me a bit.