Welcome to the forum. Unfortunately heath care professionals use very sloppy terminology as it is actually blood glucose that they are taking about as opposed to sugar which is the white stuff you put in your coffee.
So the advise to cut down on 'sugar' was good but it is all carbohydrates of which sugar is only one that you need to reduce as they convert to glucose which then becomes too high in your blood. So foods like potatoes, rice, pasta. bread, breakfast cereals, pastry as well as obvious cakes and biscuits and sugary drinks including fruit juice.
Ways of testing whether it is too high is by doing a blood test called an HbA1C which is an average of your blood glucose over the previous three months and is used to diagnose diabetes as anything over 47mmol/mol is a diagnosis.
The other way which gives a indication of high blood glucose is a finger prick test using a small hand held blood glucose monitor which gives a moment in time reading which will change throughout the day depending on a number of factors, mainly what you eat, how hydrated you are, how much exercise etc, but you don't use that for diagnosis but more for day to day monitoring or checking out your own response to the food you eat.
That allows you to tailor your diet to what your body can tolerate.
It looks as if you made good progress with reducing your blood glucose but you need to ask what your actual numbers were not just high, low, better as it gives you a better idea of how you need to modify your diet.
Have a read of this link for some menu ideas as well as some good explanation, as it will show you that you can still have filling tasty meals.
lowcarbfreshwell.com
