Hi, I went to see my GP re a bony lump on my shoulder, which I ve noticed for about the last 2yrs, but was aggrevated by falling on it 8 weeks ago, the lump got bigger but has now reduced, however sleeping on that shoulder is still painful. The GP has referred me for plain X-rays, but thinks I may have aggrevated a subluxed clavacle/AC joint. What is this and what are my alternatives if he is correct?