PETIOD CAME 1 week EARLY first time in my life.. just turned 40 yo.. 2 of my girlfriends just said they had the same exact same time ie 2-3 days ago. ANYONE experienced this? Why could this be? Thanks for sharing your experiences:)

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PETIOD CAME 1 week EARLY first time in my life..  just turned 40 yo. 2 of my girlfriends just said they had the same exact same time ie 2-3 days ago. ANYONE experienced this? Why could this be? Thanks for sharing your experiences:)