I sretched my arms back, coming down of a wall and my chest made a popping sound. it hurts to get up from bed or raise my left arm. it's been a week .

Soft tissue injury: My first instinct is to suspect a strained or torn muscle in the left shoulder/chest region. If you are able to raise the arm with pain, then it is likely to get better soon - if unable to raise arm completely, you may need MRI to check for rotator cuff complete tear. It's also possible that you suffered a mild dislocation of the shoulder. If no better in a week, see a doc for help. Good luck!