Hello!
Some things you can do:
1) Ice and heat it frequently
2) Can you move it? If you can, then it is not broken.
3) Talk to your guardian about going to the hospital
4) Rest up, don't put any pressure on it
5) Lay down on a couch or something and prop your foot up to where your foot is higher than your heart
6) You probably either broke it, or tore the muscle in the foot, along with the nerves
I hope it helps!