Weight / Fat loss

3 weeks is not much time at all, you will indeed get used to it. No need to rush things. Cheese & chips both have a helluva lot calories if you wanna get strict. I deal with my potato cravings by eating good old fashioned mashed potatoes after training. These are also more easily digestible than grain based carbs (not including booze) which also contain substances which raise eyebrows. Like wheat germ agglutinin, gluten and phyates...

Wiki;

Wheat germ agglutinin or WGA is a lectin that protects wheat (Triticum vulgaris) from insects, yeast and bacteria. An agglutinin protein, it binds to N-acetyl-D-glucosamine and Sialic acid. N-acetyl-D-glucosamine in the natural environment of wheat is found in the chitin of insects, and the cell membrane of yeast & bacteria. WGA is found abundantly—but not exclusively—in the wheat kernel, where it got the 'germ' name from. In mammals the N-acetyl-D-glucosamine that WGA binds to is found in cartilage[1] and cornea[2] among other places. In those animals sialic acid is found in mucous membranes, e.g. the lining of the inner nose, and digestive tract.

Lectins binding to stuff in our bodies is believed to be one of the causes for common ailments like rheumatoid arthritis, irritable bowel sydrome, leaky gut, multiple sclerosis, alzheimers disease etc

http://www.ncbi.nlm.nih.gov/pubmed/21280237

While on the subject of Alzheimer's disease, it has also been strongly linked to diet induced diabetes.

http://alzheimers.org.uk/site/scripts/documents_info.php?documentID=1741

http://opinionator.blogs.nytimes.com/2012/09/25/bittman-is-alzheimers-type-3-diabetes/