Leg pain below ankle. This prpblem?

I played football before 18 days. I collided with a player and there was some pain in the right left below ankle. The pain subsided after 2 days. I travelled through train and suddenly pain and swelling started in the right leg, on the 3rd day. On 4th day fever started. And i underwent treatment for fever and due to side effects or symptoms , face swelled . On 10th day, the fever and swelling of face are treated and i was fine. But, the leg pain remained. I tried to massage with a gel. The swelling become large. I consulated an orthopedic doctor and he told me to take x ray of the right leg and the x-ray was fine and there is no fracture of hairline fracture. He prescribed a pain killer and told.not to massage the leg and treat it with heat. I took pain killers and tried heat. But, the pain remained. I again consulted the doctor again today. He tested for uric acid in blood and it was below the limit. Now, the doctor again prescibed 15 days. how to address this prpblem?