I jammed my left knee yesterday night (I didn't do anything special, I don't really understand how it happened). I went to bed and hoped I would wake up okay, but I can't walk and I can't extend my leg. I can move it a little bit, so it's not completely stuck in one position, but it hurts. I also noticed that when I press on the side of my knee, on the inside of my leg, it's pretty painful. I took advil and put ice on it but it doesn't really seem to be swollen. It's kind of hard to tell since I've a big tattoo covering it, but I really don't think it's red or bruised or swollen. Just stuck. Should I just rest and take it easy until it goes back to normal or do I really have to go to the hospital?