Strong craving for sugar? Woke up at 5am last night wanting something sugary? help!?

Hi all. I'm a 28 year old Male. I'm in pretty decent health. Not the greatest. I'm 6 ft 2 around 205 LBBS. I'm actually pretty lean looking. I stopped smoking back in July of 2010 and my body has been going threw some crazy changes. Recently over the last few months. I have been very sluggish. Way more slugish than I was before I stopped smoking. I also crave sugar! It's weird. Like when I wake up, the first thing I want is something sugary. Sugary drink or a slice of cake? Last night I woke up at 5am out of no where. And My body was just urking for me to get some sweets. It was extremely difficult for me to resist the cravings. I know this sounds crazy. But usually after I eat I usually feel energized and more leveled. Is there a chance maybe I'm hypoglycemic?