Both my sister and I conceived with PCOS two weeks apart from each other. I was lucky and it happened the first month of trying. Just enjoy it and let it happen. The more you worry the harder it will be. My sister took her temperature every morning for a month and when she looked back she took note of when it was highest and what that temperature was. The next month she continued to take her temperature every morning and when she noticed that it peaked again her and her husband went for it. The temperature time method is recommended to most women before they look into IVF.
Other factors that may be hindering your effort could include, stress, lack of exercise, too much exercise, poor diet and the list continues. Take care of yourself, eat well and do what it right for you. Even with PCOS your body will tell you when it is time... you just need to listen.