i was diagnosed with pcos when i was 13 im 16 now and have been told i have got a slim chance of getting pregnant. I also have high insulin levels which mess with my hormoans and i put weight on 5 times as quick as what a normal person would, i also take metformin. Your lucky you have periods as i havent had one since my birthday in august and i rarely have them either, i seem to have them everytime i am on holiday which is very annoying =(
i got told if i lost weight my periods should come back and they told me this in may and since then i have lost around 2 stone but no luck so in feb if they still have'nt came back i have got to have a load of blood tests done.
just keep trying maybe one day your be pregnant when your least expecting it =)