IMO, the best thing you can do is to start an anticandida protocol slowly. Since you have issues with the blood sugar, you will need to check it repeatedly to know it be stable. The anticandida diet as well as candida can cause hypoglycemia.
Speak about your past, your life style, medications you have taken in the past, all this help to know about your possible candida case.
Begin a diet and keep the Nystatin tablets. You probably need to add coconut oil, sf 722, or another natural antifungal to the treatment. Keep reading and learning. It will guide you in your journey.