I Developed A Muscle Cramp In My Left Calf 8

I developed a muscle cramp in my left calf 8 days ago that never loosened. Was unable to walk or put any pressure on that leg for 3 days due to the excrutiating pain. Since then my leg and ankles are swollen only on that leg. An ultrasound was done to check for a blood clot 4 days ago and it was fine. Now, I have bruising on the back of the leg where the cramp is, which is still painful when I walk. I'm still not able to walk normal. How long will this last?