Welcome to the forum. You are having severe pain
and swelling on your ankle. You have already neglected it. Before situation worsens and your ankle is in bad shape do see a doctor in an emergency room. You need to have an X- Ray done to rule out any fracture
You can take some analgesics, calcium and mineral tablets to feel better. You should also use some muscle pain
relieving spray to feel better. Hot fomentation or use of hot pads can give you temporary relief.
If your radiology report shows hair crack or fracture you may need crepe bandage or Plaster of Paris depending upon the severity of your injury
. Do not walk, take rest.
Walking without support may spoil your ankle or complicate the situation further. Have a good day, take care.