Swelling under right Ankle

For last two months I am suffering of swelling under my right ankle. My x-ray is clean and now my dr. thinks it's a contusion of bone. The swelling is localized under the ankle. There is no problem with Ankle. This injury started when I was painting for long hours for at a least a month or so. without shoes. I have flat foot and can feel some heel spur pain. I am wearing orthotics now but my pain/swelling which is localized under ankle is not going away. Also when I walk and move around for few minutes I can feel pain in back and hip. I have taken anti -inflamation drugs, Done R.I.C.E but so far no results.Is this a known problem and what can be the best way to recover?