I fell on my ankle yesterday day that i had hurt a week prior and it was just heling now i can't walk on it without it hurting what's wrong?

Sprain or ? Fracture: First injury probably sprain since was getting better but second injury either worsened the sprain but could have fracture ( break.) You need examined and maybe X-ray

See your doctor.: Did you see a doctor for your initial injury? If so, did you have an X-ray? It sounds like you may have sprained your ankle (again, if that's what the initial diagnosis was), since your ankle wasn't fully healed and would be more susceptible to re-injury. However, a fracture can't be ruled out, so you should see your doctor to evaluate this new injury.