AM LOSING 15 POUNDS is this ok??? HOW MUCH TIME??? plan inside.?

ok so u 14 and 5'5 i dont know how much u weigh but im guessing 120 if ur skinny and 140 if ur not u dont want to lose sooo much weight its not healthy when ur young it can do some serious damage to ur body so insted of dieting go to the gym or work out at home and start eating healthy(like veggies fruits and dairies and meats)