I was in a car accident four days ago and suffered various injuries including a knee contusion. I don't know how severe the knee contusion was. I've been on anti-inflammatory, muscle spasm and pain medication. Recently whenever I wake up I feel numbness in my calf and foot. The swelling in my foot went down and in my knee a little as well, but me calf has stayed swollen. The numbness only occurs whenever I lay down for an extended period of time.