<s>[INST] I fell in February dislocated shoulder ---since then -went to have back adjusted---feel better & then was hit from behind in car accident --had more adjusting on back --feel worse than ever ---lower back feels heavy like a rod in lower back --getting hard to walk without pain ??? [/INST] You need to consult Spine specialist here or at least a Practitioner who can advise you to undergo further medical investigations like CAT SCAN or MRI. As you give history of impact to your backbone, it must have remained dormant till now but now the symptoms have started to show up. Just hope that it turns out to be muscular but never neglect spinal/vertebral injury if any. Wish you luck and may you visit specialist for help at earliest. </s>