Sugar and carbs have always been an issue for my PCOS though but I also have a lot of allergies and intolerances, as well as issues with textures. (Apparently that's the ADHD part of my life, yay!) So swaps have been difficult but I do go for brown sugar and try to avoid too much pasta or potatoes. Fewer fizzy drinks and beer is a rare treat, due to the wheat and/or malted barley.
Also, I went down the surgery route as my weight just kept going up and up and it was a lot more distressing than I could cope with. Since then, food I can take or leave a lot of the time and I'd rather have a bit of good bread than worry about it, even if it takes me forever to eat.
Maybe try sipping still water more frequently? Especially after you've had your lunch. A lot of hunger signals sent out from our brains are actually thirst ones.
I realise this isn't practical advice but getting a dog made the biggest improvement in my life with this ducked up syndrome. Every day she makes me go out, interact with people, and exercises me in a steady and less guilt prone manner than the gym or classes.
And if you're not already on metformin, you can go with chromium supplements. Holland and Barretts sell them, usually on sale, and it helps keep blood sugar levels steady.