i hurt my knee skate boarding and my front foot was still on the board while my back foot was on the ground causing me to do the splits in a way with one leg and i got a burning in my knee swelled up horribly and that was a year ago and today i went to get off a ladder and my knee felt like it clicked and made me collapse and now its got fluid in it again.. does anyone know what kind of injury this may ne to my knee?