How long until fractured ankle heals?

ok so the doctor said it mightnot be fractured like they see a little string in the x ray butitmight not be that but he saidj ust to treat it as fractured in case...so he said to go back in two weeks to do anotherx ray to see if i can step on it by then..but its not for sure..like he told me to stay off of it but i can step on it it just really hurts but how long do you think it wil ltake to heal? im 14 and 130 pounds if that helps