Help! Anorexia nervosa? No desire for regular foods anymore

Get help. This can be a very serious problem with severe medical consequences. You should seek help from a psychiatrist and/or therapist with experience treating eating disorders. I would also suggest seeing a dietician.
More please. What do you mean "regular foods"? Are you craving only sweets or odd food combinations? Are you able to maintain your weight? You may have an eating disorder or you may have another medical condition. Get evaluated by an eating disorder physician who can distinguish between the two.
Anorexia? Loss of appetite is not enough criterion to diagnose eating disorder. Need workup by you primary care doc.