Can Diabetes Cause Lack Of Balance, Difficulty In Focussing And Headaches?

I have diabetes and my cholesterol is boarderline. I ve been feeling unbalanced, flushed, unable to focus, having headaches about 3 to 4 times a week, and unable to eat too much food before feeling sick to my stomach. Unsure one feeling has to do with the other and not completely understanding if my diabetes has anything to do with it as well. I ve had diabetes for about 2 yrs now