I did something really stupid. I told my narcissistic alcoholic mother something that was very private, very personal, and very sensitive about my personal life a month ago. I needed her advice on the matter, and I foolishly let my guard down and confided in her.
I made her promise not to tell anyone, which she agreed. Less than a week later, my sisters both called me and told me that my mom had told them, and I also found out she told her creepy husband, and she gave my dad a very huge hint that I later had to try and cover up (thankfully my dad is kind of naïve so he believed me) but I was FURIOUS that she told everyone (and god knows who else she told) something that as VERY PRIVATE AND PERSONAL. It isn't just a tiny little embarrassing thing, it was a very serious private matter that no one else should have known about.

I am so angry at myself for trusting her, and I'm furious that my entire family and her friends know. She's a monster. She has been emotionally and mentally abusive to me my entire life, and because I'm so desperate for a loving mother I keep trying to trust her!

She is a continuous disappointment. I'm angry at myself for thinking I could confide in her about such an important thing.

She was NOT trying to help me by telling so many people, there would have been absolutely no point, she was simply trying to start drama and make me look bad and backstab me.

Both my sisters have already learned their lesson that they cannot tell her anything personal, because she will tell everyone. I've learned my lesson now, because I will never tell her anything ever again.

This might seem harsh because you don't know what she blabbed about, but just take my word for it that it was very sensitive, private, personal, important information that I should have never talked about to her. I am so angry that she has consistently betrayed my trust my entire life, and I foolishly keep giving her the opportunity.

Edit: By the way, when I confronted her about it, I said "Do not mention that to anyone ever again." and she said "Well I can't promise that, I might get Alzheimer's when I'm 70."

Any advice?