Talk to General Physician on Extreme Weekness, Rapid Weight Gain, Upper Back Muscles Pain

Hey Facing serious issue of shoulders and upper back pain may be due to continously working on laptop. While moving arms and shoulders i can feel some weird sounds which i predict is due to some kind of bone weekness. Doctor (General physician) suggested me calcium and vitamins for one month after that course I am again feeling the same issue. He was of the view that i might have serious calcium deficit. Furthermore, it's muscles related pain and when i workout due to sweating may be the pain gets more severe. Please suggest something for this issue. Thanks in advance