Doesn't sound like something you should get fired for but, on the other hand, as a nurse, you should not be informing family members of anything diagnosis related....that being said, families are...
If you learn one thing in nursing, before you call a doctor or an NP or PA.....TAKE A SET OF VITAL SIGNS! It is so basic and I have been an NP for 2 years and still come across this...it is so...