A year ago, a group of my friends were playing around at a friends place, and we decided to do the human pyramid (3 people on the bottom, 2 on the second row, and 1 on top). I was one of the people on the second row and one my friend who weights about 200 pounds jumped off of my back. I heard my spine crack like twice (like when you crack your knuckles). Ever since, an area about the size of my palm on the left side of my spine is sore and occasionally hurts.
How severe and what kind of injury could that have caused my spine? and what kind of doctor should I go to look for help?
Thank you so much for your help!