I am in the same boat as you, still in the beginning stages of this new diet. periods not very regular. good luck - keep in touch. I think for people with PCOS it will be harder, but we need to stick with it.
There are no contra-indications for healthful living.
Judging from your health problems if you started doing EVERYTHING right from this moment on (LFRV, adequate hydration, adequate sunlight exposure, exercise, low stress etc), I reckon it would take at LEAST a year for your body to be ready for a baby. That's my opinion anyway, but I hope I am wrong.
Sorry, but health takes time. Especially endocrine health.
I am on a similar boat as you, but I want you to have hope! :) I have gotten my periods by going HFRV and taking supplements, without meds**! Now I want to drop all supplementation and do it all natural. I think it's possible, but it takes faith and persistence. We can do this!
I cannot quite answer your question. But after changing from the pill to a non-hormonal IUD, I have now developed cysts. I may not have PCOS because apparently my hormone levels are still normal, but I need to lose at least 5kgs and it's so hard. The dr. said that due to the cysts the metabolism gets messed up, leading to easier weight gain and it being harder to lose weight. But losing weight is the only thing that will solve the problem.
I'm trying to be as LFRV as possible, to exercise lots and eat enough while not unnecessarily stuffing my face beyond satiation :-).
I'm trusting LFRV to solve the issues. Just gotta shed those kgs :-)