My skin was exactly the same so I can emphasise. I have PCOS too and it has made a total mess of my chin, it's so depressing and demoralising. But I turned it around without drugs and my skin is looking better ever day.
Firstly diet, no chocolate directly does not cause spots but poor diet will contribute to poor skin. Our skin is an organ like any other and if we eat rubbish we will likely look rubbish. Have a look on the Perricone website for his diet plans to get an idea of what food to eat, lots of water, herbal tea, oily fish, nuts, avocado and fruit and veg. Cut right back on alcohol, sugar, fruit juices etc.
Regular exercise is great for reducing stress (and hormones like cortisol) good walk in the fresh air and yoga really helps me. I do the Tara Lee Elements of Yoga, it is only 20 minutes and I do it when I get in to set me up for the evening. The first 20 minute segment is free in You Tube.
Caroline Hirons is wonderful! Have a read and start following her principles, especially the double cleanse. I do a first cleanse with a balm to remove make up then use a gentle SLS free face wash as I like the feel.
The two biggest helpers though have been Alpha H Liquid Gold and Argan Oil. Alpha H is a powerful glycolic acid but I look better the first day after using it, it's smoothed my skin tone, got rid of spots, stopped new ones forming, it is amazing stuff. I use it every other night and alternate it with Argan Oil. I was scared at using an oil at first but it actually makes me less oily, I slather it on thick at night, I go over my eyes too as it has helped reduce fine lines and dark circles as well as making my lashes and brows beautifully thick and glossy. When I wake the next day my face is brighter with no dry patches or oily patches, spots go down and are less red and sore. If I am not going out I use it as a day moisturiser too. Neither are cheap to buy but last such a long time that the monthly cost is very low. I buy from Simply Argan and they often have deals on their site, QVC can do really good deals on the Alpha H too.
If you have not tried these things please do, it has made such a difference to me and my sister too, we bother suffered terribly with persistent hormonal acne and now We can get by with some powder and a little concealer instead of thick makeup.
Good luck!