On this forum, we don't advocate the use of this kind of diet because we don't believe it's good for your body. In fact, you might want to read a recent post by someone who DID go on this diet. The link is below.
We advocate weight loss using a sensible diet and moderate exercise. If you are eating the proper foods and getting the right exercise and still can't lose weight, I'd suggest that you talk with your doctor about getting tested for medical issues that might cause weight gain or inability to lose, such as hypothyroidism, PCOS, insulin resistance, etc.
Sorry -- I just reread your post, in which you say you have PCOS -- in that case, please read the following by someone else who has PCOS
I, personally, have hypothyroidism and have a terrible time losing weight, but I keep trying. I might recommend that you try out the food diary, in which you keep track of everything you eat and drink -- this will tell you if you are staying within your calorie range, whether or not you are getting too much of the wrong kinds of fat. It will help you see at a glance where you might need to cut back or modify your diet.
There are ways to get past issues like PCOS and hypothyroidism and if you care to let us help you, we will be happy to.
If you really insist on using the HCG diet, you might want to ask your questions on the Weight Loss Alternatives Forum......