sharp pain at the point of right shoulder, sometimes radiates
Duration of illness..
The description of pain and the weakness all points towards a pinched nerve. I would like to know since when you been having this type of pain and weakness. Can you describe how it developed - did it begin abruptly (overnight) or was it something that progressed gradually.
Have you been to a doctor? If yes, did you undergo any kind of test - blood or radiological (xray/scans)
I await your reply..