You shold not be walking on it but you dont need me to tell you that.
Can I assume you have been to A&E and checked its not broken, yes you can walk on a broken ankle in most but not all cases so if you havent been then please go, you would be surprised how many people think its just a sprain.
The most important thing in the early stages of any injury is to let it rest and heal and this will affect your long term recovery, but as a radiographer my job is diagnosis not treatment so i will leave others to offer detailed advice.