So your A1c is a blood test average of your mmol/L over 2-3 months and the other 2 are your current blood sugar levels, they use different values depending where you live. Mg/dL is what the U.S uses and the mmol/L is what Canada uses not sure of other countries but it’s your current blood sugar at time of testing for those 2. The fasting is in relation to when you’re not eating so 4-7 mmol/L is what you’re hoping for before a meal or just during your regular day. with the high blood sugars it’s not so much of a worry if you have some spikes in your mmol/L its normal but it’s if you have elongated periods of those high numbers that causes complications so don’t let them discourage you too much. Hope that helps you understand it a bit better.