a couple of weeks ago I missed the last two steps on my stairs. I did not fall but came down hard on my left leg, since Sat. my knee hurts to bend or even touch, I m having a hard time putting weight on it and it feels like it needs to pop but is stuck in a catch. It has some swelling . I have been icing it for a couple of days now, but with no improvement. The pain keep getting worse. Is this something that I should go in about or continue to ride out at home? (I did injure this same knee when I was about 16, I m now 26, and had to go to pt for it (if I remember right I twisted it when I fell)