I have PCOS too.... it can take several weeks to really see a change. Be careful with the 1/2 cup of nuts and such. I eat pine nuts and macadamia but I'm VERY careful to weigh them. Well, I don't weigh the macs anymore, I eat 10, because I've never had an ounce that had more than ten in it.
If you have some good self control, you might want to consider a fat fast if you're attempting Nutritional Ketosis. Its an everyday lifestyle for me, so I'm use to it. There are TONS of blogs with LCHF recipes. This has been my way of life for years, and although I'm not overweight, when I did put on some pounds a few years back, the LCHF lifestyle is what turned it around for me, quickly and permanently.
Also, one doctor I know that agrees with the lifestyle has mentioned a bit of added discomfort in the lower belly due to a lack of movement, so make sure that's happening too!