Questions about my Diabetes symptoms

Hi, I'm brand new here. I was diagnosed about 4 months ago, and I'm still not taking medication, trying to handle it with diet and exercise, and I guess I don't fully believe I have Diabetes. Anyways...I've been a very bad patient, eating chocolate and not exercising since Christmas time. Stopped my diet and exercise program to look after my father just before Christmas, and haven't been able to get myself back on track.

Tonight I was feeling very light headed and dizzy. Then I had a couple sips of my son's slurpy and I felt better. But I have type 2, and I'm not sure why this would happen. I ate chocolate in the early afternoon, and I had just had a good supper and went for a walk after. The dizziness started while I was on my walk.

I've been sleeping a whole lot lately, and I know that's a typical symptom, but I don't get the dizziness part of it?

Anyone have any thoughts?