lost hope

I have a beautiful 7 soon to be 8 year old girl. I was blessed with her! my ex and I where not trying to get pregnant in fact we used a condom and still got pregnant. my new fiance and I decided that we wanted to have a baby together. I found out that I have pcos. we have been trying for a while now. He is very optimistic that it will happen. Me on the other hand feels like the odds are against us. every month I have the feeling that I am and every month I get a bfn. Anyone have any suggestions?