From the outside, it seems obvious what you are dealing with – a physical injury that is causing pain and everyone can see it. There is a known recovery period and you have regular medical assessments to ensure you are progressing as anticipated.
Injuries more often than not start as a physical concern. It is important to remember that a physical injury with all its collateral damage to work, schedules, relationships and general life can very easily become a mental health issue. This might not necessarily be diagnosed as clinical depression, but in my view, is situational depression.