I personally dont have it, but its very common - I believe its as much as 1 in 10 women. It shouldn't really adversely affect your chances of having children, it does make it a little more difficult, thats true, but I know that Victoria Beckham has PCOS and she has three kids!
I think some practitioners advise certain changes to diet and lifestyle to help control any symptoms though - depends how severe you have it. Your doctor should have given you some info, or you can look on the web for more insight.