Does this count as physical activity?

I work very long shifts as an OR nurse. I stand, I walk, I lift patients for about ten to twelve hours four times a week. I rarely ever sit down.

When I come home, I am exhausted and usually just go right into bed after I eat and shower. I know this is unhealthy. I’ve been really paranoid about this lifestyle. I’m just wondering if work is providing me with some form of physical activity through the day…?