I Have A Raised Mass On My Right Clavicle That

I have a raised mass on my right clavicle that I just noticed. I lift weights and 2 months ago i believe i injured my right trapezius and shoulder. I have been seeing a chiropractor and the pain has lessened but I still have shoulder stiffness. Additionally, i pulled a muscle on the right side front neck which is still sensitive. Can you suggest a course of action?