Help you through what? I am going to assume getting her comfortable with bondage again. It's been two life threatening incidents in six months. That's a lot. You say "everything is fine" and she thinks "We thought everything was fine before, and look what happened".

You say her fear is valid (and I agree), so you need to do something to directly address that and give her some time. Have you offered anything in the way of safety measures for you? Say, always having a fully charged cell phone in the immediate vicinity, or something akin to lifealert? Take steps to insure your safety so that she doesn't have to worry about having to watch you croak because she was unable to do anything (dinars to dollars, that's what is going through her mind) and I bet she'll be a lot more open to bondage again.