I don't know if this will help, but I'll post anyway. I don't think I had PCOS, but from puberty until about the age of 23 I had really, really irregular periods (probably anovulatory), bad acne from about the age of 19, and unexplained fatigue. For most of this time I was on what you'd call a "junk food" vegetarian diet. I ate LOTS of dairy and refined carbs, not too many fresh veggies. When I was 23 (about 2 1/2 years ago) I stopped eating refined sugar and flour and most dairy and eggs and upped my intake of raw food and fresh veggies. For about a year I've been a strict vegetarian.
After I improved my diet my cycles went from 6-8 months long to 2-3 months long (still irregular, but much better) and I was ovulating. I think they would have gotten even better with time, but I got pregnant less than a year later.
My acne has completely disappeared and I no longer have any problems with fatigue (despite being a new parent).
What I eat...let's see...
For breakfast I like to have smoothies made from raw tahini or hemp seeds, dates, a banana, and raw carob powder. Or healthy cereal with almond milk or rice milk. Or sometimes just fruit and herbal tea. On weekends sometimes I make vegan pancakes or french toast.
For lunch/snacks I like to have salads, raw veggies with hummus or tahini dip, and I've really been craving peanut butter sandwiches lately.
Dinner: Black bean burritos with leaf lettuce and LOTS of guacamole, brown rice or quinoa with raw veggies chopped on top with tamari and other sauces and sometimes tempeh, whole wheat pasta with tomato sauce (I often crumble tempeh in the sauce like ground beef), BIG salads with sunflower and hemp seeds sprinkled on top...
There are SO many resources on the internet. I'd suggest doing a google search. vegweb.com is one of my favorite sites for recipes. This forum is also great if you're looking for ideas of what to eat, especially the "what's for dinner" threads. If you want people to post food diaries, I'd suggest starting a new thread called "vegans: what did you eat today" or something like that. You might also be able to find old ones by doing a search.
Good luck! I highly recommend getting off junk food completely and most (if not all) dairy. I'm sure it would do wonders for your condition.