Most doctors vastly under treat diabetes.

An A1C of 6.5 is NOT good. That means your average BG is around 154, which is well over the point where you start acquiring diabetes related damage to your organs, nerves, heart, kidneys, eyes and everything else. 140 is the point damage starts to happen.

5.9 is a little better but you're still very close to the 140 mark. If I were you, I'd look for a doctor willing to treat the diabetes more aggressively. Maybe go on Metformin until you lose more weight and the BG comes down.

Or you can hold your current course and keep a close eye on the A1c, if it doesn't come down below 5.5, definitely find some medical help, IMHO. But your high blood sugar is going to do more to ruin your health than your cholesterol.