4-6 weeks. Sending you mending thoughts!
Bone healing. Bone healing, the process begins immediately hematoma/soft callus/ hard callus (see diagram) so in a way partial healing is present right away! If you mean how long until there is enough structural integrity to sustain range of motion without loading, the short answer is 3-4 weeks but this is very dependent upon the fracture and how it has been treated. Sorry to say but...Ask your doctor.
Yes. Yes. It is a fracture of the 4th and/or 5th metacarpal bones.
Boxers fracture. Refers to a fracture of the 5th metacarpal neck. That is in the hand so yes if you have a boxers fracture you can also say "i have a broken hand".