I've had left back pain under by back bone left to my armpit underneath the bone feels like sore or ripped when I move. Been a week not should I I get a X-ray or wait? Could it be a strain?

Back pain. needs to be evaluated by your doc. He/she will let you know if and what kind of imaging or treatment you need. It can range from strain to something more serious. Peace and good health.
Sounds muscular pain. Try simple analgesia and some exercises If pain persists or gets worse see your doctor for full assessment and management.