Normal, since you were a light smoker. It takes approx., 2 weeks for it not to show up in blood work. I would say your safe for it not showing up.
I also have type 2 diabetes and my blood sugar sometimes gets low as well. I was told by my doctor to let them know if my blood sugar is 60 or lower...
Smoking crack or taking any type of drug like that, of course your in danger. Get off it now for a more healthier life style, if you want to live...