I dont recommend taking hardcore pain killing drugs normally, but it sounds like you desperately need some relief so it's justified in this instance. It's my recommendation that you take a 200mg tablet of Motrin, and wash it down with one liter of water. Continue drinking water throughout the day, at least a glass every hour, and abstain from any strenuous physical activity for awhile. If you absolutely cannot bear the pain, then I'm sorry, you need to go to a doctor and they may have to amputate your ankle / foot / entire lower leg. I can't in good conscience recommend exceeding 200mg of Motrin, that's already pretty extreme as is; I don't want to see you turn into a junkie and destroy your life my friend.