Is there something wrong with me?

Well im a thirteen year old girl and this has been happening to me since i was a little girl. First let me say that i have gone to many doctors and they have send that it's nothing really this is happens to most people, but everyone i have talked with has said im crazy. Not a good felling. Well first i am always thirsty, i know that can mean your liver is failing but the docs say everything is good, second i can never sleep i maybe get 3 or 4 hrs of sleep in a week but im totally fine im never tired or to sleepy to go on or p out anywhere. And last i seem to be okay but when i get around people it's like im feeding of there energy, my friends say that when im not around them there okay but when i come around almost instantly they start to feel wicked tired and can beryl keep there eyes open. I know this sound super crazy but......i can like almost see the future i know how this sounds but it's true i will make a reference to something that happens in the day and then it will happen it freaks me out. And right after it happens i seem to get a horrible head ack. All im asking is am i crazy or is there something more to this. My family from legend come from witches and vampires but that cant be real.....right :( im worried and if u took the time to read this thanks