It's not unusual at all to take a while to begin "the melt" as Suzanne calls it. You go through a sort of purging period where you are getting rid of all the nastiness you've been eating and your body is adjusting to the new Way of Eating (WOE). I started losing after about 4 days, but I had been eating a somewhat low carb diet to begin with and I ate almost no carbs at all the first couple of weeks until I found an all carbs meal I liked.
I actually had the opposite problem with my bowels. Too much cheese and not enough fiber stopped me up!
But whenever you make a major diet change it is possible this will happen.
You might try starting a journal of what you eat each day so that you can evaluate your diet a little better. That would allow us to answer your questions better too. Check out the Journal forums and see if that idea appeals to you. For example, have you been eating many artificial sweeteners since you changed your eating habits? The sugar alcohols in many SF candies can cause gas and soft stools. Look for Maltitol, Lacticol, Sorbitol or any other "itol" in the ingredient list if you are eating these. Some people are quite sensitive to them and cannot eat them at all.
Grapenuts are perfectly legal and very yummy but they are also have one of the highest carb counts off all the legal cereals you can eat. For example, the Hi-Lo cereal I like to eat has 7 effective carbs whereas I think Grapenuts has 43! (subtract the fiber grams from the carbs grams to get the "effective" carbs) So even while you are staying within the rules you can make food choices that will make your weight loss go faster or slower. I lost fine eating Grape Nuts, but only two or three times a week and not every morning.
Here are a few things that can interfere with weight loss even when you are following the plan carefully:
Eating too many carb meals
Eating carbs late in the day
Eating too much fat (many people overdo on this at first)
Eating too many artificial sweeteners
Eating too much fruit
Eating too soon before you go to bed
Each person is a little different so you will have to experiment and see what works for you. At the start follow the plan as closely as you can and pay attention to her tips. For example she says to eat all you want, but she also says you will find yourself wanting less over time, so three helpings of mayo with every meal is probably not what she has in mind. She has lots of recipes for Level 1 desserts, but you will also notice that she only eats these herself a few times a week, not every day. (this one is my downfall) One thing I notice alot around here is that many people choose to overlook the part about caffeine. If it wakes you up and keeps you awake at night, or makes you jittery when you overdo, then it WILL affect your weight loss even in small quantities.
Just a few things I've observed since I started posting here. Hope they might be helpful to you.
I think Suzanne said it took her two months to begin losing, so don't be discouraged! Some people even gain a little at the beginning
, but if you read though the posts here you'll see nearly all of us have had good success on this plan.
Best of luck to you, and welcome to the gang!
MB