You have to "sign something" (a Release of Information form) in order to give permission for any information to be released
from your record (and the form specifies what information is to be released, and to whom), NOT to keep your information private!! Your medical information is always
to be kept private unless you give instructions otherwise.
I appreciate that you have a personal relationship with this nurse and information about her past that makes you reluctant to create problems for her, and that is certainly your choice to make, but I do hope you will at least make her employer aware that this happened -- if she did it to you (disclosed legally protected information), she can/will do it to others, and, again (not to beat a dead horse), that is a serious violation of Federal law, state law, state BON rules specific to nurses, and even (as you note
) the Nightingale pledge (!) The next person whose confidentiality she violates may well not feel so charitable and forgiving, and her actions can have legal repercussions for her employer, as well.