A question about hilary duff's weight loss?

she used to weigh 130 right? and she didn't look that fat i mean she looked really healthy and everything.. now i weigh 135 lbs and how is it that i look unhealthy( fat).. it's really weird because i am 5'2 tall and she is also 5'2 tall.. btw i have been dieting so anyway..?? i weigh 133 now i have been dieting for 3 weeks by the way