so its not like a cold are a flu something you catch and get over, its different. its been happening for around a year. i used to be able to run miles and now i can barley run a few laps and im still in shape and havent gained any weight, and my legs dont get tired my lungs do. btw im 15. im 5'9 and 104 pounds. anyways i faint A TON i get this really sick feeling where im mega hot and i feel like im dying and if i stand i faint. also for around the same amount of time my upper back by my neck has been killing me just from sitting there, also my left eye has been moving by itself in school. and no i dont need glases i have perfect vision, anyways it just twitches and it kind of hurts. um yea sorry this is long but whats wrong with me?