If you had told co-workers what happened? were they understanding or do you regret doing it?

I've been off work on short term disability since Sept 6th...my husband called and told my boss I'm BP and she said she had to tell the administrator above her and human resource of course, but stated no one else would know. My co-workers have no idea why I'm out, but they will ask me when I go back...
I don't know what to say? I'm a nurse and most my co-workers are nurses also.