I've just read your other thread. It does sound as though you've been through the mill with the medical profession and your GP sounds pretty clueless but....
For whatever reason, diabetic or not, your blood sugars have been too high over an extended period. (hba1cs look at the average of the last 3 months). This will exacerbate any kidney disease you have (it may even be its cause, but I don't know your health history).
There are two main types of diabetes, T1 and T2. T2 happens when someone is carbohydrate intolerant (think of it like someone who is gluten intolerant). Their bodies vainly overproduce insulin in order to attempt to mop up the excess sugar floating around in their blood stream but it's a vicious circle typically involving weight gain leading to more insulin resistance. Many of the T2s here break the circle and achieve normal blood sugars without medication by reducing the carbohydrate in their diet - everyone's body is different and you need a blood testing meter to discover which foods your body can cope with.
However, I am also going to talk about T1 diabetes, which can occur in people your age as well as children, but in adults it is often misdiagnosed as T2 initially. This is caused by a failure of the insulin producing cells in your body and some people can control it for a while by reducing their carbs (as it can take a while for the body to stop producing insulin altogether and obviously if you eat less carb you need less insulin). There are tests to differentiate between the two illnesses, which your doctor should have done, but didn't because he is one of those who naively misdiagnosed all late onset T1s as T2. If you have T1/LADA (not that likely because T2 is much more common) then you will need insulin eventually or you will die of diabetic ketoacidosis. (Not a pleasant way to go and you need to be aware of it if your blood sugars persist in the teens or above for a long period, as you'll need to go to hospital on a drip while they clean out your blood.)
I'm afraid I agree with the others that you may need medical intervention, particularly with the blood pressure. Can you buy a blood pressure meter as well as a glucose meter? There's plenty of advice on these forums to help you go medication free if you are T2. But you need to keep testing your blood sugars to make sure that they aren't too high, and ring the hospital if it looks as though you might be going into diabetic ketoacidosis. High blood pressure is also likely to give you headaches as well as potentially cause kidney damage., so it's best to monitor that too.
Good luck. Please be careful.
