Hi Slimminggirl -
You've come to the right place - you're not alone with this
-on the one hand, pcos people often become pregnant whilst on cambridge (the jury is out about whether that's simply the weight loss improving fertility or whether it gives the body a bit of a jolt - certainly people without pcos often experience a brief shift in periods/hormones too -
-on the other hand, it's not recommended to be on cambridge while you're ttc, pregnant of breast feeding. It's so very important that we get the right amount of nutrients for our bodies in those early days of pregnancy that a VLCD isn't ideal. I've heard people suggest that taking pregnancy vits and minerals at the same time is a good idea, especially for folic acid.. but then, on the other hand, you don't want to over dose on vitamins either.. some can be really unhealthy to have too much of (like vitamin a).. especially when you're pregnant.. so best is to not have both at the same time.......
your periods sound regular enough that you don't need to worry too much, and actually, the best thing you can do for fertility is relax and just enjoy yourself
there's good advice all about pcos on
Home | Verity - PCOS Charity
most recommended long term healthy eating for pcos is about glycaemic load (GL).. which I'm planning on turning to once I've finished cambridge.
Even with pcos, most women conceive eventually - it just might take six months or a year rather than just a month or two. We've been ttc for three years, but I've been particularly unlucky so don't compare yourself with my circumstances. Understandably it's easy to fear the worst, but the most LIKELY is that you'll fall preggers within the year if you relax and don't get too stressed about it
of course it also depends on other factors like how old you are.. if you're over forty it's going to be a much different story.. but it's all still possible in your mid-late thirties, even with pcos
if you're only in your twenties - relax, have fun, and don't even think about risk of infertility

GPs won't be interested until you've been trying for over a year at very least because healthy young people without pcos can take up to a year to conceive anyway..
good luck and keep us posted!

And most importantly - have fun trying! and enjoy life for the moment xx