My doctor has mentioned signing me off before due to stress/depression. I've never felt like I really needed it but now I might. If I get signed off for however long (be it a week, two weeks or more) can I be fired from my job? I've been there 10 months full time. It would entail a shop I run being shut until I'm back. I feel like they could say it won't work due to the whole situation. Can they fire me?