I was kicking the football my knee cracked and now I can barely walk.. Theres very little swelling but when I try and bend my knee there lots of pain to the out side... I have it resting with ice on it now and I doesn't hurt just sitting there.. The same thing happened to me 2 weeks ago and I thought it had got better... This time is much worse tho.. Last time I could walk with it... Wondering if this could be something serious or wether it's just a sprain cheers