Young and ttc

My fiancée and I have been trying to convieve for nearly 9 months. But unfortunately we haven't yet. We try almost every weekend. I'm taking folic acid because I've heard it helps you get your body ready before pregnancy and during. Everyone around me and everyone I know are getting pregnant by accident and some on purpose. But I can't for anything. I'm losing a lot of hope. I have a syndrome called Polycystic ovarian syndrome and it can mess with fertility. My question is, do you think it's because I'm still young and my body isn't complete mature yet or is it something else wrong with me? Someone please help me and give me advice on what I should do. I have baby fever really bad.