No, it's not a red flag, what is a red flag is that you are still worrying over stuff like this.
You are completely, completely overthinking the sway diet. You aren't a diabetic, for a start. You don't even have diagnosed PCOS! Plus, you're low weight and breastfeeding, meaning you may actually NEED a bit more carbs than the average person on the alternate diet just to keep weight on and milk supply up. If you stick within the limits of the day you really cannot be getting more than the appropriate amount of carbs. (somewhere in this thread I have posted that explanation for you, using math to show how you're probably eating fewer carbs than you were before)
You can absolutely have the rice cakes. Or the wraps. Or both. People eat brown rice cakes, brown bread, brown wraps, and get good results with that. Even people with moderate to severe PCOS go onto the alternate LE Diet just the same as you are doing and have good results with it - we have seen people who have never had a regular cycle in their adult lives having regular cycles on this diet - so it just cannot be the case that you have to be so restrictive, it makes no sense and you're killing your sway trying to save it.
To explain the biology involved, if a diabetic eats a bunch of sugar and then takes a fiber supplement they will still have a very large problem on their hands. Fiber is not a fix for too many carbs; if it was, they'd give diabetics fiber instead of insulin. also, let me stress to you again that some rice cakes with 28 g net carbs is not a high carb meal in any way. Fiber can somewhat "slow down digestion" (and I use air quotes there because it's really less of a "thing" than people make it out to be, as anyone who has tried to diet by eating huge salads, oatmeal, brown rice, and bean dishes only to find themselves starving in an hour will attest) and because digestion ~may~ go slightly slower, then your blood sugar ~may~ (MAY! Depending on what else you eat!) rise slightly slower and because of the slower rise, your body starts to release insulin a little sooner, and thus your BS levels ~may~ not peak ~quite~ as high. Fiber also ~may~ help people feel full sooner and eat less at meals (again, I've found this much less of a thing than people claim). But fiber is not a magic fix for eating too many carbs, which was how your original question was phrased; if you eat a gob of empty carbs your blood sugar would rise high and fast no matter what. We take fiber for pink sways to possibly absorb some of the fat and fat soluble nutrients that may raise levels of sex hormones like estrogen and testosterone, but not because we think it has any beneficial effect on blood sugar levels.
The biggest reason, by far and away more important reason to use whole grains on the alternate LE Diet is because they simply aren't that OMG WOW type of carbs like sugar and white flour. Whole grains have complex carbs which take longer to break down - so your body handles them better even if they have the exact same amount of carbs in them as the refined products do. Additionally, whole grains have the fiber which is indigestible. Since your body can't digest it, it just moves through the digestive tract and can (just like with fiber supplements) absorb some of the fats from your diet, and additionally since they're indigestible we don't count the grams of carbs from fiber (which is why we subtract the fiber in the rice cakes) meaning that they actually have fewer carbs than they seem to.
I just used regular sugar when swaying. At that point we didn't know about having two different diets. I don't have any PCO tendencies that I know of though - my period is very regular, I have had blood sugar tests both when pregnant and not, and passed them, and while I did have a sway opposite I think that had more to do with me taking all the Ingender supplements plus prenatals with my sway. So I was probably able to handle more sugar/carbs than a person with PCO-tendencies could (I don't want anyone thinking "well atomic had sugar, that means I can too" because we're clearly seeing better results with the alternate diet than we are with the higher sugar standard one.)
Most people who use artificial sweetener probably use aspartame. Splenda is another option. I'm allergic to Splenda and I had gotten my 4th boy while using aspartame, so I didn't use any of them.

