I was playing basketball and I spun very quickly. It felt like something popped. The pain is in my lower right back. The muscle feels like it pops in and out or a bone popping in and out. Everytime I bend over or turn to my right the "pop" or whatever it is occurs. The pain and throb is constant but if I lie down or sit for a while it eases. A doctor told me I strained a muscle but I believe that is far from what is wrong. Any suggestions?