There's no need to be "worried" per se, however it would be best to see your GP/family doctor, just in case anything else is going on with the foot. Since it is 3 weeks since the original injury, and it has not quite "healed" yet, it would be perfectly justified to see a doctor.
However if you had done something to the foot, after you thought the original injury had healed (say, "played football the day before, then your foot swelled up and was painful"), you probably just need to rest the foot for quite a while longer.
If you have severe pain in your ankle, see your doctor, or a hospital. You may need an X-ray of your ankle.
Go to the doctor, it could get worse.
You should put ice on it and take a painkiller.
Treatment for an ankle injury will depend on what the injury is and how severe it is. If it is a simple sprain, ice on the swelling can cause some relief. You can also take some anti-inflammatories for the pain and swelling. If it persists you should see your doctor.
No you should see a GP
The severe swelling and loss of arches could be the symptoms of ankle damage to diabetes or a broken ankle. It is best to see a doctor about this.
Severe pain may be a sign of complications, and should be reported to the physician.
My foot and ankle is swelling now!!'
First, keep the leg with the ankle injury raised to maximize the blood flow. Then you should consider seeing a doctor if the pain doesn't stop. Take some soothing medicine also to relieve the pain.
There are many different things that could cause severe foot pain. Gout, bunions, arthritis, or a bruise are just some of the more common pain. If you are experiencing severe foot pain, you should get it checked by a doctor.
Ice is the best thing for minor ankle pain. If the pain continues or gets worse, you should get an x-ray to see if you broke any bones. You also might want to look into a new pair of shoes to support your ankles better.
The most common way to treat ankle pain is with ice and a bandage wrap, but there are many more options. For more ways to treat ankle pain please visit http://www.ehow.com/way_5145266_home-remedies-ankle-pain.html.
There could be mulitple causes of ankle pain including but not limited to arthritis, tendonitis or a sprain.
Call your doctor and explain the symptoms to them. If it is not during your doctor's regular hours and the pain is severe, you should consider going to the ER.