Burning pain in upper left arm.

I am a recovering drug addict years ago when i would take alot of uppers i would get a buring pain in my upper left arm that wld radiate into my back and my left arm would get very cold I have been sober for 9 months and when i stopped using drugs the pain stopped until about a week ago it also feels like my left bicep and lat muscle are deteriorating even though i lift weights on a regular basis I went to the doctors when all this started happening and they couldnt find anything wrong so i dealt with it and was relieved when the pain stopped after i got sober but now that it is back I am worried and scared to go to the doctors because I dont want them to think that I just want to be put on medication