I'm surprised that your dictor told you, you would become infertile. PCOS
can cause infertility but there are typically ways to fix it. Also, have you been trying or just stunned by the news? There are many women who still get pregnant even with PCOS, alot of it depends on what lab work shows your hormone levels to be and often you are prescribed medication, etc. I wouldn't worry yourself to much, I don't know why your doctor would worry you like that.