msjoleary,
This uncomfortable physical sensation you mentioned suggests to me that your body and you are in conflict about how or what you should be eating.
Now you may chuckle to yourself and say, "Yeah, no kidding! So what's new?", but... please hear me out.
There may be good reasons why you may find yourself wanting to eat the "wrong" foods. In these days of frequent dieting it is quite possible to have a body that has been pushed into starvation mode - desiring high fat, high sugar foods without end. Any attempts to change it only makes the desire stronger and more uncomfortable, as the body interprets your attempts as further starvation. It is my experience that, in any tug-of-war between what my body says it needs and what I think it should need, my body always wins out in the end, and that is what I see when I read your post.
Below are two links that may be of interest to you. The first concentrates on regaining a healthy response to hunger - listening to hunger signals, deciding what those signals mean you are hungry for, knowing when you are full and stopping. I recommend this because in my experience when we struggle with our weight, we tend to lose touch with what our bodies are actually saying. We make our own interpretations, based on what we've read, seen, or think is the right thing to do, and that often leds us out of touch and far astray. Then we wonder why our bodies do not "appreciate" our efforts.
The second is a forum composed of a group of supportive people who have had enough of dieting and want to be "naturally thin" - i.e. to reach their ideal weight by listening to their bodies and being non-judgmental. The simple concept they use is the same - listen to your hunger, and go with it. However, as following this principle isn't always easy to do, for example, "What do I do when my body is hungry for a whole packet of cookies?", knowing that such a forum exist can be helpful, for mutual support and the sharing of experiences.
http://www.thintuition.com/thintuition_home.php
http://p066.ezboard.com/fbodywisdombylanifrm2
I think the two programs complement each other well. By the way, I do not have any personal or financial interest in these groups. However I have participated in both programs and it has helped me to get to the point where I don't actually have to worry about my weight or what I eat to have a body I am happy with. Maybe this information, coupled with the Natural Brilliance course, will help you break through and achieve your goal.
Best of luck!
[This message has been edited by GödelEscherBach (edited October 14, 2005).]