From what you've described, it's possible that you may be experiencing disordered eating patterns. The alternating cycles of normal eating and then dramatic restriction could be indicative of an eating disorder.
One eating disorder that shares similar characteristics to what you described is "binge eating disorder." This disorder involves periods of regular eating followed by episodes of excessive food consumption, often accompanied by feelings of loss of control.
Alternatively, you could be experiencing "anorexia nervosa" or "restrictive eating disorder" during the periods of dramatic restriction, but it's essential to remember that only a qualified medical or mental health professional can provide an accurate diagnosis.
It's crucial to address any concerns about your eating patterns and behaviors with a healthcare professional who specializes in eating disorders. They can conduct a proper evaluation, discuss your symptoms, and determine the most appropriate course of action, which may include therapy, counseling, and other forms of treatment.
If you are concerned about your eating habits and their impact on your physical and emotional well-being, don't hesitate to reach out for help. Early intervention and treatment can make a significant difference in overcoming eating disorders and promoting a healthier relationship with food and your body.