Hi, I'm a 17 year-old right-handed player. I have a pain/tingling in my lower right back, when I twist to the left a lot. I can feel it the most when sitting down, crossing my right leg over my left, and twisting to the left. This problem began a long time ago, when I hit an off balance two-handed backhand, though it was very very minor before. It has come back and is really bugging me. I read about some other threads and saw stuff about herniated disks. Is it likely I face the same problem? What exercises can I do to heal it?