Hello. I was snowboarding earlier today and about 3 hours ago I ran into rocks and fell backwards, landing sharply on another rock that struck directly on the central part of my back just above my buttocks (lower back) above my coccyx. After the initial shock I was able to gingerly snowboard down the mountain on my own (almost 2000 feet). Now that I m home my lower back has swollen significantly and I am virtually immobilized. I can walk very slowly, as if I strained a muscle in my back, but have tightened to the point where reaching down or walking up/down stairs is extremely painful. I m also concerned about the amount of swelling. I d like to avoid X-Rays and feel fairly certain that it s just a severe contusion. I m icing my back and have taken 750mg of ibuprofen. Should I be more concerned? Thank you in advance for your assistance.