First doctor I went to told me "there's no point in doing tests until you want children" I was 18 at the time, didn't go back to another doctor for 3 years who within 4 weeks had diagnosed me with PCOS. Thanks to that doctor I may now never have kids cos I've stopped ovulating. Make them check you if you are concerned, if you have PCOS and diabetes runs in your family they will probably put you on metformin as a preventative, or like me, they might put you on the pill. I would def force them to check you though.