Christie's Vicious Red Moon Cycle

One night at (I don't know, a dance?), Christie doesn't feel too well and leaves home early. She wakes up to find she has transformed into her vampire form (be aware Christie is already a hybrid and can become part vampire at will). Only now, she feels more bloodthirsty and has a need to feed, no matter what circumstance. Upon further research, Harding discovers that Christie is going through a phase known as the red moon cycle. Once every year, on a certain full moon, it appears red on the hybrid causing him/her to become highly aggressive and bloodthirsty. Can they save her and the people she goes after in time for sunrise? Well I first have to write up a script which no one may see because I barely finish writings. Oh well.
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Halfway upon thinking this up, I realized this is a metaphor for PMS.
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I don't know what kind of style I made with this gritty tone, or if it's already been done, but I like it!