she's in charge of how many hours i will work each week and what hours I'll work. :s
My female coworker became my manager today and im stressing. What do I do?

Y'all don't get along or why are ya stressin?
Once she's officially manager, you'll just have to respect (or at least deal with) the power structure and what that means for individual responsibilities, and try to be a professional while you're at work.
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