PISSED

I've had a few miscarriages and I went in to get a couple of tests run and while I was waiting for the results I waited a couple of days and called and wondered why I hadn't gotten them. And they said that they had been calling my mother not me. Why in the hell would they call my mother? (Who is the single biggest loud-mouth on the planet.) I have never in my adult life (since graduating high school) been on my parents insurance. I got my own insurance and as long as I've been going to an OB have NOT had my parents number on anything. Our numbers aren't even close enough to misdial... 
So I showed up to thanksgiving and my fiancé and I are greeted by a bunch of hugs and congratulations on our pregnancy which my mother blabbed about. I hate grieving in a group. And we weren't going to tell anyone until the second trimester. 
I've been very upset about this because this is not the first time I've had them call my mother and not me. I've double, triple, quadruple checked my info on that and NOT ONE piece of info in any of my files is my parent's. 
This isn't the first time my mom has known my results from my appointments before me. I have been extremely kind and forgiving about this bullshit. But I have had it. It may seem dumb. But my records are MY RECORDS. And should NOT be blabbed about so loosely. How should I approach my OB office to let them know that it will not be tolerated anymore?