My sister had PCOS and and incompetent cervix, so obviously we have struggled through her births and fought her challenges. My questions and concerns are that I am 26 and no diagnosis thus far. I am afraid to make the appointment. But hear me out, over two years of dating with no protection? We drink, and I smoke. Even so, should I be worried? No pregnancy so far. Is that normal? Or should I be concerned? Please, advise.