I have had many a problem in the past with hypoglycemia, PCOS, and probably some insulin resistance. No-S has helped me break the sugar high/low cycle and I am finally able to go longer than a few hours without food without feeling faint, nasty (mean), and wacky. But I have learned a few things in the process.
First, sugar and highly processed foods are my enemy (especially without protein and fat). A Slurpee with empty carbs = DISASTER!! My husband thought I was a monster from the black lagoon!!! He He!
Second, I MUST have a balanced meal to get me to the next one without these nasty feelings. That means protein, complex carbs, often a starch, and PLENTY of fat. Do not be afraid of fat! It keeps your blood sugar stable and digests very slowly so that you don't crash.
Third, I have found (for me personally, anyway) eating too often seems to aggravate my blood sugar problems. Eating less often seems to keep me from wanting to eat and allows my blood sugar to stabilize.
So, try balanced meals. The second and/or third day will probably be awful! (Especially if you eat a lot of sugar. It may be much, much more than you think) If you fail, you fail, just keep trying to stick to it. Experiment with the number of meals. Try 4 at first perhaps (No S does not dictate the number of meals). DO NOT, I repeat, DO NOT worry about how large your plates are at first. They are needed in the beginning to get you to the next meal. They will get smaller. You will probably be amazed at how much sugar you did eat and how quickly your taste buds change. When you do have your sweets on S Days, make sure they have fat and/or protein. Think chocolate, butter, peanut butter, nuts, etc.
And most of all, remember the people on here are REALLY supportive! They are always welcome to give advice/personal experience.

And you will probably find your sugar levels stabilize!