I just got really dizzy/light headed and i can barely walk?

my feet feel heavy and i am having difficulty concentrating...i dont have any sort of health problem that i know of...im only 17...i just feel like im about to pass out.I just got really dizzy/light headed and i can barely walk?
If you are 17 , this shouldn't be happening.
Go to a Doctor, Tell him the symptoms,
answer all his questions honestly.
He is there to help , not to judge, if you think you don't want to tell him stuff.
There is a long great life waiting for you ahead, track down the problem , and get back on your adventure.
your too skinny perhaps
In case it's low blood sugar, drink some milk. Could be low potassium so eat a bananna.
Tell an adult! it could be your blood pressure dropped if you stood up too fast or it could be blood suger is too low or it could be nothing but tell your parent & go to Dr if it happens again
It sounds like low blood sugar, you need to eat a piece of candy or drink a juice, that should help, if not go see a Doctor but my husband is the same way he always has a candy on hand.