Calf soreness

Getting out of a golf cart my left foot caught a post and twisted my leg about 75 degrees. I felt immediate pain and bent over. I walked it off and continued my round. Three days later it started to ache very noticibly. There is no skin discolorization yet. The left side of my knee is sore and the right side of my calf is extremely sore to the touch.(at the 2:30 clock position, from my knee to my ankle). I am in training for a ski trip. What can I do to recover ASAP?