Physical therapist or chiropracter for back pain?

Both: At our institute we have both. I feel thar formal physical therapy is important. I feel that a well-trained chiropractor can also help. If either makes you feel worse, then i would stop that type of treatment.

See an MD : First see an MD experienced in back pain to ensure that this is musculoskeletal and not nerve or cardiac or ulcer or gallbladder etc. related. He/she may then refer you to a PT who can help with heat, stretching, massage , strengthening etc