Voice of reason chiming in...
First off-it makes absolutely no sense to cut out oatmeal, and still let you have Kashi or fiber cereal. They are all carbs, the serving sizes you are allowed are all similar in calories, and they all contain fiber. Oatmeal is excellent for you, and there is no reason I can see why it should be taken out, and other nutritionally similar things should still be allowed. Rant over. The women over in the LWL part of the forum eat oatmeal every morning.
Second-Kool-Aid, Pepsi, Coke, juice, sweetened tea, Cappucchinos, lattes (and all coffee drinks that are not just "plain coffee") have calories. You should be drinking water, tea, regular coffee, diet soda, and Crystal Light. Tea or coffee should be sweetened with stevia/Splenda/Equal or something calorie free. Caloric drinks absolutely count against your weight loss.
I don't think the problem is food allergies-that would not make a difference in weight loss either-you would have other side effects most likely instead.
Also, how is your exercise? Proper diet is only part of the equation. You have to eat less, and move MORE.