+1 for the call to the Chiropractor.
I broke the top of my tailbone slightly when I was younger and it pinched a nerve between the tailbone and the 1st vertebrae. The pain would subside until I moved a certain way and then I could barely walk. I had to see the chiropractor 3 times a week to keep realigning my spine to allow the tailbone to heal. Havent had a problem since.
