have you ever been unwell and eaten practically nothing for a few days.
Sometimes you get a large weight loss, but sometimes you may only drop a pound! The explanation is that while you were feeling unwell, your physical activity was far less than usual. Balance that against what you did eat and drink, large quantities of glucose laden fizzy drinks quite often - they are very high in calories. Toast and biscuits often figure very highly when you feel unwell. Figure out approximately how many calories you usually have and how many you had whilst ill, then bear in mind that it takes a reduction of 3500 calories in your normal eating habits to lose a pound of body fat.