I twisted my knee, almost falling but was able to keep from going down. I felt a pop and intense pain in the outside of my knee, right around the bone that sticks out the most. But after standing for a few minutes I was able to walk. half hour later, could walk straight, but getting in and out of truck, standing up from chair or turning at all is VERY painful and I have the sensation that it will give out. Should i seek medical attention or just ice it and elevate?