I'm 13 years of age. I have to pee constantly. diabetes runs in my family, about 3 of my grandparents have it, and so does my dad. also here recently I have been getting extremly lightheaded. I also smoke. about three days ago I fainted at my friends house. It was right after I smoked. I have also notice after I smoke I always get light headed. I am also a few pounds over weight. now serverly but still every pound counts.