Welcome, you have found a great forum for 15 years + of information about the Atkins Diet, recipes, etc. Much of the information goes back to before the New DIet Revolution book in 1992 where Dr Atkins introduced the subtraction of real food Fibre carbs like vegetables. See Induction food sticky above.^
Some of us have found that counting net carbs slows or stops weight loss, especially when processed fibers and sugar alcohols are what is being netted out. If you read back through threads in this Atkins sub-forum you will find other members warning about use of the Atkins products. I personally use no processed foods, especially not diet foods like Atkins, some of the reasons in these articles.
https://www.dietdoctor.com/atkins-fairy-tale-candy The only place Atkins products "fit" is on the company's sales and profits charts.
Being "in ketosis" or fat-adapted which is what you likely mean varies by person. If you were insulin sensitive, athletic and in metabolic good health you might be "in ketosis" at 50-100 g, most everyone slips into ketosis while sleeping. But for the typical overweight person posting here 100g total carbs is too high, under 50 g total carbs is a more common level suggested for ketosis, and eating under 20 g total carbs is necessary for many with a lot of weight to lose. Search "ketosis" in the link above, DietDoctor has good explanations of basics about and myths of ketosis.
Many doctors starting with Dr Atkins suggest to be certain you start burning body fat during induction and until goal weight, feel the benefits of reduced hunger, and eventually become fat-adapted etc. to at least begin at 20 g total carbs. Here is a good introduction to LC that includes all the basics about a Low Carb diet and offers three levels of carbs in the diet to choose by your health and goals. With PCOS and being overweight, you are likely insulin resistant, so the two week challenge diet at 20g total carbs would be a good place to start for you. Just. Eat. Real. Food.
https://www.dietdoctor.com/low-carb
You can continue to use MFP, customize the goals as described here.
http://eatfatlosefatblog.com/how-to...ketogenic-diet/ Move the Fibre column next to total carbs column. So if you want to know the net, subtract in your head and add the number in the notes. The calories are always there in MFP, but you do not need to count them on LC or Atkins to start.
EDIT to add. I looked at a CS bar...it had 38g carbs and 20 of those were sugar. 20g of sugar is like adding 5 Teaspoons to your tea. Since you are a nurse, take your blood sugar before you eat one, then again 30-60 minutes afterward to test how these products react in your body. Why guess at a number of carbs you should eat when a glucose meter can help you shape the right diet for you. Remember that normal blood sugar in your entire body is only 1 teaspoon.
https://lowcarbrn.wordpress.com/dia...b-for-diabetes/