What Causes Pain And Bruising In Calf Muscle?

Hi I was running about two weeks ago now n tore my calf mussle. I still can't put any weight on my foot and my leg cramps extremely bad any is very painful when I try to walk. I've got a lot of bruising around my foot and ankle. Is this right or is their something else wrong. I'm 46, 6 ft and weigh 14 stone no health problems as know of.