i'm an 18 year old female , and have been feeling lightheadedness aswell, but it's been on and off for about a month, but the past week it's been an everyday thing, only it doesn't last all day.. it feels like i'm in a dream or really really drunk, and my diet is fine, and i've been getting enough, if not too much sleep, i haven't been drinking or doing drugs with the exception of smoking cigarettes.. and i don't think i'm sick becase i've caught colds and such that my little sisters had brought home, and gotten over them.. any ideas as to what it is, and how i could fix it??