Had pain in my left arm for a few weeks now - pretty sure it's muscular, it comes and goes but can be quite bad when it flares up. I assumed i'd just strained a muscle (probably picking up ds, the little lump!) and it would clear up on its own eventually, but it doesn't seem to be improving. Can my GP actually do anything to help, or am I better off going to a physiotherapist or even an osteopath? Any ideas? TIA!