I'm in the ER being held overnight. Buy I still cannot stop stressing about the work I missed today. As well as all the work that needs done by Monday. Why can't I ignore work even while an the hospital

In the best case because you like and really care for your work.

At worst because you are afraid of complaints due to toxic workplace.

But remember that you need to be alive to do any work so health should be a priority.

Sounds like you need a long enough vacation that you have time to forget everything about work. If it keeps coming back to your head, the vacation is not over yet.

Because your workplace has warped your moral compass. Do something about it now; because they won't.