should I go on workcover or not/ temporary resident

I need some help. I have a disc protrusion in my neck which occured through repetetive movements at work. I am now the second week out of work and I used up all my sick leave and annual
leave I have accumulated. The other problem is I am on a 457 long term business visa that means I am only a temporary resident.
Does anyone know if I get my sick leave days back if I am granted for workcover. Some people told my that I might be disadvantaged in the future because of workcover especially if I need a new visa.
Does anyone have some experience???
First I tought I won't use it but now it seems the whole healing process takes longer then expected.

Many thanks!!!