there is definitely hope.
I developed PCOS after the birth of my 3rd child when I was 21, so in a way I was very lucky because I already had babies. It got increasingly severe over the next few years. The doctor even said I would be unlikely to conceive naturally again. I wasn't unduly concerned about this at the time though. I had never lost weight after the birth of ds2, and it kept on creeping up, and in the end after reading lots I decided that in order to try and improve my health I really needed to lose weight.
My dad needed to aswell, so we went to weight watchers together.
I lost 2 and a half stone....... and became unexpectedly pg after using no contraception as I had been told it was extremely unlikely 
After ds3's birth I was told it recurs in a 1/3 of cases. We decided to try for another right away, as the older 3 were born closer together, and ds3 had been born 3 days after ds2 had started school. DD2 was born 15 months later 
Lo and behold after about 4 years the PCOS returned.
But, I am currently 30 weeks with a surprise (i know, you would think i would know by now
) baby number 6.
So what I am trying to say is it IS possible. Don't give up hope.
I found WW helpful because I could eat whatever i wanted as long as I counted it, and I'm no good with restrictive diets, and also it was more about portion control for me rather than changing what I ate.
HTH