Janieg, adding to what mrsD wrote;

"When you eat less glucose the liver makes more. And the liver is not a very accurate organ for this, and tends to make more than you need."

I guess that you have Type 2 (not Type 1) diabetes.

If so, metformin is a medication which is worth considering. It stops the liver from making too much glucose.

Like all medications metformin has both potential benefits and risks - this is something that your clinical care team should be able to tell you about.