hi i am 19 and felling light headed to day. and my body is aching a little. also i seem to be tired a lot of the time. i stand an my feet at school I a m in culinary school i was on my feet yesterday for almost 12 hours. my right leg has been quit a bit more sore than the left lately. i was thinking the soreness and tiredness had to do with the fact that I am on my feet all the time. but when i started felling light head i was wondering if is more severe.