You have been through so much with your health. It just amazes me how physicians will not listen to you and insist that drugs are the cure instead of focusing on everything that can affect your health. This includes exercise, family history, sleep habits, stress levels, work habits, attitude/well-being, drugs you take, and diet. As far as books, try The Schwarzbein books. She writes a bit about PCOS. Her diet recommendations include eating a wide array of foods, but avoiding bad carbs. Dr. Atkins has good info on candida/yeasts. I would not follow anything like a diabetic diet. Doctors say diabetics should maintain blood sugar within such a wide range. And the worst advice ever is that when a diabetic or someone with any blood sugar problems feels hypoglycemic, stuff high/quick absorbing carbs into the body for a quick cure to the hypoglycemia. That advice sends diabetics on blood sugar roller coasters where they get hypoglycemic, have a high carb food (even with protein), get high blood sugar, then have a low sugar episode after the blood sugar plummets, then to eat something high in carbs again. It is insane. Avoiding quick absorbing carbs will help with blood sugar. Eating fat and protein is your best bet for sustaining blood sugar and insulin levels. If you don't feed your body stuff that is absorbed as glucose in the blood, your body will not create the excess insulin that causes all of the problems.
As for the antibiotics you were put on, it looks like they cause insulin to be quicker acting, released in higher amounts, or more effective at ridding the bloodstream of glucose. Whatever it is, it is not natural. There are so many side effects of antibiotics that it is hard to say the totality of their effects. It certainly is bizarre to be put on a non-topical antibiotic for one year. They certainly are not natural and kill off the good yeasts and bacteria in your digestive system.
For checking blood sugar, I used to have a tester. In the days before this diet, I learned to tell the symptoms of high or low blood sugar. If I felt faint, weak, got really grouchy, or couldn't concentrate, I knew my blood sugar was low. If I got groggy and slow, my blood sugar was high. I had big problems with low blood sugar so I had to deal with that frequently. My brother gets migraines when his blood sugar gets low. It took him almost fifteen years of getting migrains before he saw an endocrinologist who properly diagnosed him (and put him on drugs).
I hope I've answered some of your questions. As some of the women here have stated, maybe some hormones could help. In my opinion, you probably need to find a good stable diet that makes you feel well and alleviates your various symptoms. If you can find some sort of specialist with a clue about PCOS, that is an alternative. There is a PCOS group that has listings of doctors across the country who specialize in PCOS. This can be an expensive route. But if you find a good doctor who listens, she may be able to get you started on the right track. Go to http://www.pcosupport.org/