My voice constantly goes up an octave when i talk, why?!

Alright, i'm 15 and a girl, so my voice isn't breaking unless there's a voice breaking for girls that i haven't heard about. Lately when i've been talking my voice has gone up an octave (which means it reaches a higher pitch than it would normally) can anybody tell me why its doing this, its very annoying, i liked the way my voice sounded before. Thanks in advance.Health Question & Answer

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