After years of struggling with PCOS, here’s how she regained control of her weight and vitality — It all started with a pimple. It perched on my sister’s chin, massive, painful, and unbearably long-lasting. For two weeks, my sister avoided public outings. “A one-time thing,” she told me. “Maybe I overate chocolate this week. Who knows?” But it wasn’t a one-time thing. For nearly three years, my…