ok,my flute doesnt ever give me problems, i know its me, because i have three headjoints, and they do this, Its only like ONCE IN A BLUE MOON! but sometimes, when im playing a high note, it will go low, even if keeping the same same air stream, i dont know why, and its annoying when im practicing, what is it im doing or even ,maybe the flute?

Most likely you're dropping your airstream (you need to aim it higher for higher octaves) or letting the air pressure drop. It's probably not the flute if it's dropping from the higher pitch once you've already established that note. Of course, we can't really diagnose problems like this without being able to observe you playing, so you'll need to consult a teacher for a definitive answer to your question. Odds are it's a matter of what you're doing with your airstream, though, so you might try experimenting a little bit and see if you can't resolve the problem.