I work in pedi ortho. Yes it will go away. Your baby is SO young and as the body heals it will remodel the bone. The only thing that slightly worries me is you don't mention it bring a difficult birth or the baby having pain. Although newborns can have broken clavicles from birth parents usually report a difficult extraction, shoulder distocia, or pain after birth. There is also a condition pseudoarthrosis of the clavicle where it doesn't fuse together right and the baby has a clavicle that basically isn't connected. It can often be mistaken for a fracture. This issue will not heal without intervention. It has a very classic appearance on X-ray. I would request a repeat X-ray in 2-3 weeks to make sure it heals or else see a pedi ortho person. Hope things get better quick though!!!
Happily married to "M" and loving life with my toddler "B" 8.17.10. Waiting for #2, my christmas baby!!