I recently went to the doctor for burn wounds that weren't healing well. They weren't infected, but weren't healing and I wanted advice on how to treat them. The doctor was very calm about it all. (Doctor knew I was depressed, was seeing a psychiatrist and a psychologist, and he knew about past suicide attempts) When I complimented him on this, he said of course he didn't like to see such wounds, but didn't see the point in blaming or judging me. (He said it a little differently, in my language, so it sounded more natural)

It's unlikely you'll be sectioned 'just' for SI. You need to be a clear danger to yourself.