I'm really sorry you had a work-related injury @Gentiana! I hope a doctor can help you and that you have a medical insurance that would cover the cost of treatment.
I never had any kind of work-related injury yet, although I do feel that sedentary lifestyle takes its toll on me.
This is why I try to move whenever I have a chance and engage in physical activities (gym or team-based sports and swimming).
I need to do it more, though as I do have some light pain in the back and in wrists every know and then.