I've learned a few things from my girlfriend's recent collarbone break. Firstly, not all collarbone fractures are the same. Sounds daft, but most are clean mid-shaft brakes which heal really well with relatively few complications, often without surgery. Lots of cyclists bust their collarbones like this and can be back on their bikes in a relatively short time, especially (as Toby says) with their top-end medical support (the legitimate kind, that is!).
My girlfriend's was a messy distal fracture - at about 15 mm from the the shoulder end - which needed plating and immobilising. The operation to plate a collarbone can cause all sorts of nerve damage and referred pain, and the screws and plate actually protrude under the skin causing inflammation and bruising - I wonder if that might be like yours? Her consultant is adamant that the plate will be removed as soon as all is well so that there aren't any further complications or unnecessary risks (e.g. breaking a plated collarbone isn't advisable), probably after it's been in for 18 months and, again, I wonder if you might be in the same boat.
Despite all that, go see an expert! You only have one body.
