I have extremely severe pain in my left shoulder and upper arm from bursitis. i've tried heat, cold, physical therapy and meloxicam with no success. ?

Get MRI: If you have 'bursitis' diagnosed by history and physical exam/ X-rays only and have had the treatment you discussed w/out improvement then a good quality MRI scan is indicated. If you've had an MRI scan which confirms above then see a qualified ORS for possible subacromial injection or arthroscopic decompression/rotator cuff repair. Best if Luck!