There are two basic mechanisms at play in T2D. Insulin depletion and Insulin resistance. Either of these changing will affect your response to glucose. What medications are you taking currently?
Has your weight increased any, or has your girth increased? Volume increase means that your pancreas has to output more insulin to cope since it is directly related to BMI. This is one reason why doctors try to encourage us to lose weight.
The diet you are using may be contributing to driving up insulin resistance (IR). Even portion size or increased fruit consumption can affect this. Do you follow any particular diet plan, or is it the standard diet with icecream and cream cakes on the naughty step? Many here find that as T2D we are very sensitive to what we eat.
You do not mention any self testing, but I bet if you were to invest in a glucometer, then you would be surprised at how different meals affect you. We call it Eat To Meter, and it is the best investment I ever made. It opens a window onto how your body reacts to certain foods. You may find you could actually reduce or stop some of your medication just by altering your diet. I did, and my HbA1c tests are in the low to mid 40's for seven years now. There is plenty of informtion in this forum on diets that others here use to do the same.