A stone is 14 pounds.14 pounds over 7 months is about 2 pounds a month.Cutting out about 500-600 calories a day (assuming the diet before hand was basically about the right amount to maintain your previous weight) should lead to a 2-4 pound a month weight loss.So it sounds like the weight loss is in line with the calorie restriction and that is normal and nothing to worry about.Most diet plans for gradual weight loss (a pound a week or so) generally have you shoot for reducing you intake by 500 calories a day.The weight loss that is a concern is when you lose like you reduced your diet by 500 or more calories a day but you are not eating fewer calories and/or you are having to eat more than you should to keep from losing weight.Cutting down on your calories and losing weight IS normal and how a healthy body works. Usually after a period of mild calorie restriction that you maintain you get to the point where you are at the weight that number of calories maintain (based on your weight, age, and activity level) and then it tends to level off and you stay at the new weight if you keep eating the same way.Everyone's weight goes up and down in a pound or two range if you are eating a consistent diet that maintains that weight. Some days you are a bit more hydrated than others and your weight often fluxuates by more than that over the course of the day.