hello. i'm 16, and am 5'3" and 95 lb.
to loose weight, try to eat about 1200 cal a day, mostly from fruits [berries are low cal] and vegetables. try to keep the fats, meats and fatty cheses or creams to a minimum. you may be doing low-carb, but that doesn't mean eat poorly.

lean meats, such as shrimp, salmon, or boneless skinless chicken breast are best if you eat meat. [i don't.]

if you can make atleast 800 of your calories from vegetables and fruit, and nuts, then you're in good shape.

good luck! hope you reach your goal.