Hi! I am Mareah. A little less then 1 week ago, my knee just started hearting out of nowhere. I was just standing and the next min. I was falling on the sofa with sever knee pain . It felt like my knee contracted and I could not stretch my leg. I thought it was some sort of cramp in my knee because I could not stretch it out. However there was nothing stif around my knee. I still can not put whight on my knee. I can not walk very good. Although the stifness has eased up and relesed I still cannot stretch out my knee and it herts, but it is sort of hard for me to pin point the sore of the pain. I feel like it is in the back of knee, but sometimes it just feel like its all over, in the back, front, and on both sides.