I am a 23 year old man. Initially had healthy weight of 62 kg, 15.5% body fat regrettably decided to lose 6 kg in 3 weeks to get to 56 kg because wanted to be lean, have 6 pack at 10-12% body fat. Anyway, combination of overexercising cardio every single day for 3 weeks and unhealthy dieting wasnt good now have excess saggy skin around neck as well as muscle loss (neck) particularly under jawline and chin. 3 months later now back to stable weight of 65 kg through proper eating habits and moderate exercise. still upset about excess loose skin around face and neck feel guilty and remorseful about losing the weight too fast please help me find a solution. height=5 ft 7, weight=65 kg